by carrying out experiments involving a bacteriophage, a type of virus that attacks bacteria, and were able to provide definitive evidence that dna was the transforming factor, true or false?
Answers
The given statement " by carrying out experiments involving a bacteriophage, a type of virus that attacks bacteria, scientists were able to provide definitive evidence that DNA was the transforming factor" is true because the experiments conducted by Alfred Hershey and Martha Chase in 1952 demonstrated that DNA, rather than proteins, was the genetic material responsible for inheritance and controlling cellular functions.
In 1952, Alfred Hershey and Martha Chase conducted a series of experiments involving a bacteriophage (a virus that infects bacteria) and were able to provide definitive evidence that DNA was the genetic material responsible for the transfer of traits from one bacterium to another. They labeled the DNA and protein of the bacteriophage with different radioactive isotopes and then allowed the labeled phages to infect bacteria. By measuring the radioactivity in the bacteria, they were able to show that it was the labeled DNA, not the protein, that was transferred from the phage into the bacterial cell and caused the bacterium to take on the traits of the phage. This experiment provided strong evidence that DNA, rather than protein, was the genetic material responsible for heredity and transformation.
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If a trait is x-linked recessive, who would express the trait?
a. homozygous dominant females and hemizygous recessive males
b. homozygous recessive females and hemizygous recessive males
c. the same proportions of females and males
d. heterozygous dominant females and hemizygous dominant males
e. heterozygous recessive females and hemizygous dominant males
Answers
Option B: homozygous recessive females and hemizygous recessive males would express a trait which is X-linked recessive.
Homozygous recessive females and hemizygous recessive males for a dominant allele express an X-linked recessive trait more significantly. This also implies that females exhibit the trait more frequently. This is because females have two X chromosomes, whiles males have only one. If a female is heterozygous for a particular trait, it would be suppressed by the non-carrier allele and would not be expressed. Hence, females with homozygous recessive trait would be expressive. Option B is thus the right choice.
X-linked recessive inheritance is a mode of inheritance in which a mutation in a gene on the X chromosome causes the phenotype to be always expressed in males (who must be homozygous for the gene mutation because they have one X and one Y chromosome) and females. Carriers are females who have one copy of the mutated gene.
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Option B: homozygous recessive females and hemizygous recessive males would exhibit an X-linked recessive characteristic.
For a dominant allele, homozygous recessive females and hemizygous recessive males exhibit an X-linked recessive characteristic more prominently. This also means that females are more likely to display the feature.
This is due to the fact that females have two X chromosomes whereas males only have one. If a female is heterozygous for a certain characteristic, the non-carrier allele suppresses it and it is not manifested. Females with a homozygous recessive trait would so be expressive. Option B is consequently the best option.
X-linked recessive inheritance is a kind of inheritance in which a mutation in a gene on the X chromosome causes the trait to be always expressed in men (who are not affected by the mutation).
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What is the meaning of the abbreviation T1: finger abductionL2: hip flexionL3: knee extensionL4: ankle dorsi-flexionL5: great toe extensionS1: ankle plantar-flexion/ankle eversion/hip extensionS2: knee flexion?
Answers
The abbreviation T1, L2, L3, L4, L5, S1, and S2 refer to the spinal cord levels of the thoracic and lumbar vertebrae, as well as the sacral vertebrae.
Here is a list of what each acronym stands for:
The first thoracic vertebra, or T1, is situated in the upper back and is referred to as T1. L2: The second lumbar vertebra, or L2, is referred to as being in the lower back. The third lumbar vertebra, or L3, is situated immediately below L2 and is referred to as L3. The fourth lumbar vertebra, or L4, is the one immediately below L3. The fifth lumbar vertebra, or L5, is the one immediately below L4. First sacral vertebra, or S1, is referred to as this and is situated at the base of the spine. The second sacral vertebra, or S2, is the one that comes after S1 and is referred to as S2.For such more question on vertebrae:
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what is the most likely significance of bidirectional flow in the left verterbral artery as compared to the antegrade flow in the right vertebral artery
Answers
Left subclavian stenosis is the most likely significance of bidirectional flow in the left vertebral artery as compared to the antegrade flow in the right vertebral artery.
What is left subclavian stenosis?In subclavian stenosis, the artery is merely narrowed, resulting in reduced blood flow outside of the blocked area. A condition known as "subclavian steal" can happen when the subclavian blockage is severe or if the artery is completely blocked.
As initial management, endovascular stenting and angioplasty should be used to treat symptomatic subclavian artery occlusive disease. Open surgery should be taken into consideration if it fails. Both the subclavian and axillary arteries can be used to bypass the carotid artery.
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pls helps will reward brainliest
Answers
Answer: intercalary meristem
Explanation: meristematic tissue at the base of the leaf blade is ben to the plant growth
More than 90 percent of the nitrogenous waste that is processed and excreted by humans is derived from the breakdown of proteins. Most of the remaining nitrogenous waste material is derived from the breakdown of
Answers
More than 90% of the nitrogenous waste processed and excreted by humans is derived from the breakdown of proteins. The remaining nitrogenous waste material is mostly derived from the breakdown of nucleic acids.
Proteins are the major source of nitrogenous waste in humans. When proteins are metabolized, they are broken down into amino acids. The amino group (-NH₂) in these amino acids is then removed, and the resulting ammonia (NH₃) is converted to urea in the liver. Urea is less toxic than ammonia and is excreted by the kidneys in urine.
Nucleic acids, which are found in DNA and RNA, also contain nitrogen. When nucleic acids are broken down, they are converted into various nitrogenous waste products, such as uric acid and creatinine. Uric acid is excreted in the urine, while creatinine is excreted in both urine and feces.
Overall, the breakdown of proteins is the primary source of nitrogenous waste in humans, with the breakdown of nucleic acids contributing a smaller but still significant amount.
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The exchange of oxygen and carbon dioxide between the air in the alveoli and blood in the lungs is called
Multiple Choice
tissue gas exchange.
systemic respiration.
ventilation.
pulmonary gas exchange.
cellular respiration.
Answers
The exchange of oxygen and carbon dioxide between the air in the alveoli and blood in the lungs is called pulmonary gas exchange.
The pulmonary gas exchange process occurs in the lungs during the process of respiration. Alveoli are the tiny sacs in which the oxygen from the inhaled air diffuses across the thin walls into the bloodstream then it binds to haemoglobin in red blood cells. Simultaneously, carbon dioxide diffuses out from the bloodstream into the alveoli and exhaled from the body.
The necessary oxygenation of the body's tissues is ensured by pulmonary gas exchange, which also ensures a new supply of oxygen in the blood and the elimination of carbon dioxide. It supports cellular respiration, which is how cells use oxygen to make energy and is an important step in the whole respiratory process.
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The exchange of oxygen and carbon dioxide between the air in the alveoli and blood in the lungs is called pulmonary gas exchange.Pulmonary gas exchange is the process by which oxygen and carbon dioxide are exchanged between the lungs and the environment.
Pulmonary gas exchange occurs between alveolar air and pulmonary capillary blood, resulting in the transfer of oxygen from the air to the blood and the transfer of carbon dioxide from the blood to the air. It is a part of external respiration. In other words, it is the process of gas exchange that occurs in the lungs between the air and blood.Long answerThe exchange of oxygen and carbon dioxide between the air in the alveoli and blood in the lungs is called pulmonary gas exchange. Pulmonary gas exchange is the process by which oxygen and carbon dioxide are exchanged between the lungs and the environment. Pulmonary gas exchange occurs between alveolar air and pulmonary capillary blood, resulting in the transfer of oxygen from the air to the blood and the transfer of carbon dioxide from the blood to the air. It is a part of external respiration.In order to achieve pulmonary gas exchange, a number of factors must be in place.
This means that the alveoli, which are small air sacs in the lungs, must be able to exchange gases effectively. The alveoli are surrounded by capillaries, which are small blood vessels that transport blood from the heart to the lungs and back again. The capillaries in the lungs are responsible for carrying oxygen-rich blood to the body's tissues, and they also carry carbon dioxide back to the lungs for removal from the body.Another important factor in pulmonary gas exchange is the presence of a concentration gradient. This means that there must be a difference in the concentration of oxygen and carbon dioxide between the alveolar air and the pulmonary capillary blood. This gradient allows for the efficient transfer of gases between the air and the blood.In summary, pulmonary gas exchange is the process of gas exchange that occurs in the lungs between the air and blood. It is a vital process that allows for the delivery of oxygen to the body's tissues and the removal of carbon dioxide from the body.
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How are the terms ovum, zygote, and embryo related?
Answers
Answer:
ovum fusing with sperm will give zygote (fertilization)
The zygote later on develops to an embryo in the womb after implantation.
relationship between algae and fish
please help me..
thanks
Answers
secondary active transport across a membrane refers to a. movement of a molecule across a membrane and against its concentration gradient through a transporter that is directly powered by atp hydrolysis b. movement of a molecule across a membrane and against its concentration gradient powered by an ion gradient that is created by a different transporter c. movement of a molecule across a membrane powered by its own concentration gradient d. movement of a molecule across a membrane through a transporter that has an alpha-helical secondary structure. e. none of the above
Answers
secondary active transport across a membrane refers to (option b) the movement of a molecule across a membrane and against its concentration gradient powered by an ion gradient that is created by a different transporter.
A transporter protein couples the movement of an ion (typically Na+ or H+) down its electrochemical gradient with the uphill movement of another molecule or ion against a concentration/electrochemical gradient in secondary active transport across a biological membrane. As a result, another solute is transported against a concentration or electrochemical gradient by using energy stored in the ion's electrochemical gradient.
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In the “hierarchy of life” which of the following terms is above (includes) all of the others?
a. organism
b. community
c. population
d. ecosystem
Answers
Answer:
b community
Explanation:
A population is a group of organisms belonging to the same species that live in the same area and interact with one another. A community is all of the populations of different species that live in the same area and interact with one another.
During the mid 1930s, G. F. Gause studied competition among three species of Paramecium. Through his experiments he formulated a principle of
Answers
During the mid 1930s, G. F. Gause studied competition among three species of Paramecium. Through his experiments he formulated a principle of:
G. F. Gause formulated the principle of competitive exclusion, which states that two species competing for the same resources cannot coexist in the long term.
In his experiments with three species of Paramecium, G. F. Gause observed that when two species were grown together in a limited environment with limited resources, one species would eventually outcompete and eliminate the other species. This occurred because both species were competing for the same resources, such as food and space, and one species would be more efficient or better adapted at utilizing those resources, giving it a competitive advantage.
Over time, the competitively superior species would dominate the available resources, while the weaker species would be deprived and eventually die out. Gause found that no two species could coexist indefinitely when their ecological niches overlapped to a significant extent.
G. F. Gause's experiments and observations led to the formulation of the principle of competitive exclusion, which has since become an important concept in ecology. The principle highlights the intense competition for limited resources in nature and suggests that species with similar ecological requirements cannot coexist in the long term. However, it is important to note that in real-world ecosystems, various factors such as environmental fluctuations, adaptations, and niche differentiation can allow for species to coexist to some extent, even if they compete for similar resources.
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Which is a disadvantage of molting in arthropods?
A. The arthropods blend into their environment as they go through the process.
B. The new exoskeleton can sometimes be too small, requiring multiple molts.
C. The arthropods are more easily caught and eaten during the process.
D. The new exoskeleton is not usually as strong as the older one.
Answers
Answer: The answer is C. The arthropods are more easily caught and eaten during the process.
Explanation: If you search the answer you’ll get: Approximately 85% of arthropod deaths occur during molting. The insect is extremely vulnerable to predators during and right after the shedding of its old skin.
Answer:
C
Explanation:
Huntington's disease, which causes degeneration of neurons, runs in Maria's family. Huntington's is a heritable autosomal dominant genetic disease. In an autosomal dominant disease, only one abnormal allele abnormal to cause the disease in offspring. However, it is possible not all offspring will receive the from an affected heterozygous parent. Family members that have the disease in Maria's paternal grandmother and Maria's paternal uncles. Maria's paternal grandfather does not have the disease. Because symptoms of Huntington's disease do not appear until later in life, genetic testing is necessary to determine whether a individual possesse Maria's father does not carry the allele for Huntington's disease. symbols d that Maria create a pedigree to track the disease in her Use the provided to complete the Each be used family more than once.
Answers
Huntington's disease is a rare, genetic condition that results in the progressive destruction of brain nerve cells. It typically causes mobility, cognitive, and psychological issues.
Is Mark not a carrier of the disease allele?
Considering that Mark's paternal grandfather and grandmother are free of the illness. Mark's paternal family is represented by the symbols on the right. If neither of his paternal grandparents is impacted, then neither is his father nor his paternal aunt.
In addition to his maternal aunts, his maternal grandfather is also impacted. Since Mark's mother does not carry the disease-causing allele identified through genetic testing, she remains unaffected.
Given that neither of Mark's parents are afflicted, it is clear that Mark is not a carrier of the disease allele.
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An ASC would neverperform which of the following services?
Question 147 options:
A) Knee arthroscopy
B) Intraocular lens exchange
C) Hemorrhoid excision
D) Kidney-pancreas transplant
Question 148 (0.666666667 points)
This one-year-old boy has a midshaft hypospadias with a very mild degree of chordee. He also has a persistent right hydrocele. The surgeon brought the boy to surgery to perform a right hydrocele repair and one-stage repair of hypospadias with preputial onlay flap.
Question 148 options:
A) 54324, 55060, Q54.1, N43.3, Q54.4
B) 54322, 55040, Q54.1, N43.3, Q54.4
C) 54324, 55060-51, Q54.1, N43.3
D) 54322, 55041-51, Q54.1, N43.3
Answers
The answers include the following:
An ASC would never perform a Kidney-pancreas transplant and is denoted as option D.The code for the conditions such as one-stage repair of hypospadias is 54322, 55041-51, Q54.1, N43.3 ba dis denoted as option D.What is Medical coding?This is referred to as the process in which medical diagnosis and treatments are translated into numeric and alphanumeric characters in other to prevent ambiguity during documentation.
ASC is referred to as ambulatory surgery center and perform surgeries such as knee arthroscopy, intraocular lens exchange etc but are unable to perform transplants hence option D was chosen.
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How are we, as a species, physically illsuited to the natural world while also being psychologically ill-suited to one another? How do these two contradictions necessitate the existence of an economy? Discuss.
Answers
The physical and psychological contradictions that humans face necessitate the existence of an economy. Through economic systems, we can overcome physical limitations and address psychological conflicts, ultimately fostering adaptation to the natural world and promoting cooperation among individuals.
As a species, humans are physically ill-suited to the natural world in several ways. Unlike other animals, we lack natural protection such as fur or tough skin, making us more vulnerable to extreme temperatures and physical harm. Additionally, our slow reproductive rate and longer period of dependency as infants make it challenging for us to adapt to rapid changes in our environment.
Psychologically, humans are often ill-suited to one another due to differences in personality, beliefs, and values. This can lead to conflicts, misunderstandings, and difficulties in communication and cooperation. Humans have a tendency to prioritize their own interests and can struggle to empathize with others, leading to social divisions and fragmentation.
These physical and psychological contradictions necessitate the existence of an economy. An economy is a system that allows individuals and societies to allocate resources, goods, and services in a way that addresses these contradictions. Through economic systems, humans can overcome physical limitations by using technology and innovation to adapt to the natural world. For example, we build shelters, use clothing for protection, and develop tools for hunting and gathering.
Economies also provide a framework for addressing psychological conflicts by facilitating trade, specialization, and cooperation. Through trade, individuals can exchange goods and services, allowing them to access resources and satisfy their needs. Specialization enables individuals to focus on their strengths and skills, contributing to the overall well-being of society. Cooperation within an economy fosters social cohesion and allows for the development of institutions that help regulate and resolve conflicts.
In summary, the physical and psychological contradictions that humans face necessitate the existence of an economy. Through economic systems, we can overcome physical limitations and address psychological conflicts, ultimately fostering adaptation to the natural world and promoting cooperation among individuals.
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Which of the following nerves allow sensory and motor impulses to be sent from one nerve directly to another?A.somaticB.connectingC.peripheralD.autonomic
Answers
The connecting nerves are the ones that allow sensory and motor impulses to be sent directly from one nerve to another so the correct answer is option (b).
Connecting nerves, which are also known as association neurons or interneurons, transmit sensory and motor impulses between two nerve cells, allowing for communication between them. These neurons are located in the central nervous system (CNS), particularly in the spinal cord and brain. Interneurons in the spinal cord are also known as intrinsic neurons because they are found entirely within the spinal cord and do not extend beyond it. When a sensory neuron is stimulated by an external stimulus, it transmits the impulse to an interneuron in the spinal cord, which then transmits it to a motor neuron. In turn, the motor neuron will send the signal to the effector organs, which will respond appropriately.
Connecting nerves are critical in the reflex arc, which is an automatic and rapid response to a stimulus that occurs without the involvement of the brain. Connecting nerves are also responsible for synaptic integration, which is the process of combining several incoming nerve impulses in order to produce a single outgoing impulse.
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Explain the structure of the nucleus in a living cell
Answers
Answer:
The nucleus contains nearly all of the cell's DNA, surrounded by a network of fibrous intermediate filaments and enveloped in a double membrane called the "nuclear envelope". The nuclear envelope separates the fluid inside the nucleus, called the nucleoplasm, from the rest of the cell.
hope that helps<3
Answer:
Look at the explanation
Explanation:
Nucleus is situated in the cytoplasm of the cell.
Usually, it is round but many different shaped nuclei can be seen in some cells.
It is surrounded by two porous membranes called nuclear membranes which remain continuous with the Endoplasmic Reticulum.
Within the nuclear membrane is present a liquid substance called nucleoplasm.
Nucleoplasm contains two types of chromatin material: Heterochromatin and Euchromatin.
Chromatin fibres are thin thread-like structures composed of DNA and proteins.
These fibres condense to form short thick chromosomes during cell division and become visible.
DNA molecules transfer hereditary information from one generation to the next.
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A balloon is filled with helium gas at 27°c and a pressure of 1.0 atm as the balloon rises the volume of the balloon increases by a factor of 1.6 and the temperature decreases to 15°c what is the final pressure of the gas ( assuming none has escaped)
Answers
Answer:
0.6 Atm
Explanation:
P1V1/T1 = P2V2/T2
P1 = 1 atm
V1 = X
T1 = 300 K
P2 = ?
V2 = 1.6X
T2 = 288 K
1*X/300 = P2*1.6X/288
=>P2 = 0.6 Atm.
heap or stock method of manure preparation through earthworm farming
Answers
Explanation:
yrv-thks-szm live bio practical class is going on here
Answer:
In the heap method, the daily collections from cattle shed are spread in uniform layers until the heap attains a maximum height of 1 meter above the ground. The top of the heap is rounded and then plastered with dung and mud mixture. In both, the pit method and heap methods aeration is allowed in the beginning and later on anaerobic conditions set in and continue for a long period.
How do postzygotic isolating mechanisms prevent successful interspecies hybridization?
Answers
The postzygotic isolating mechanisms prevent successful interspecies hybridization because although fertilization may be considered as successful, the resulting hybrid offspring is unable to develop or reproduce.
What are postzygotic isolating mechanisms?The postzygotic isolating mechanisms are different evolutionary mechanisms that prevent the emergence of hybrid species by acting after fertilization and therefore they act on the offspring to avoid further reproduction of these individuals.
In conclusion, the postzygotic isolating mechanisms prevent successful interspecies hybridization because although fertilization may be considered as successful, the resulting hybrid offspring is unable to develop or reproduce.
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The best method to reduce the threat of overfishing would be to . The risk of oil spills could be reduced by increasing the use of , which should help oil consumption. If an oil spill does occur, could be used to help remove the oil so the ecosystem may more quickly recover.
Answers
Answer:
The best method to reduce the threat of overfishing would be to limit the harvest of particular fish species. The risk of oil spills could be reduced by increasing the use of renewable energy sources , which should help decrease oil consumption . . If an oil spill does occur, bioremediation could be used to help remove the oil so the ecosystem may more quickly recover.
Explanation:
African penguins, which inhabit the coasts of southern Africa, were classified as an endangered species in 2010. Two significant threats to their survival are ecosystem damage from oil spills and overfishing by humans. Overfishing depletes the food supply of African penguins.
The best method to reduce the threat of overfishing would be to____
1. Construct a corridor to connect penguins and fish
2. Limit the harvest of particular fish species
3. perform a population survey on several fish species
The risk of oil spills could be reduced by increasing the use of
1. Natural resources
2. Renewable energy sources
3. Nonrenewable energy sources
, which should help______ oil consumption
1. Increase
2. Decrease
. If an oil spill does occur, __________ could be used to help remove the oil so the ecosystem may more quickly recover.
1. Bioremediation
2.reforesation
3. recycling
Overfishing can be prevented by formulating policies to limit the harvest of fishes on the basis of species they belong to.
Opting for renewable energy, such as solar or wind energy, would greatly reduce the dependence on non-renewable energy sources such as fossil fuels. Reduction in oil dependence will in turn reduce the risk of oil spillage into the environment. as well as reduce oil consumption.
Spilled oil can be removed from the ecosystem by relevant bioremediation processes. Bioremediation involves the use of biological species to clean up pollutants (such as spilled oil) from the environment.
Answer:
blank 1- limit the harvest of particular fish species
blank 2- renewable energy sources
blank 3- decrease
blank 4- bioremediation
The best method to reduce the threat of overfishing would be to limit the harvest of particular fish species. The risk of oil spills could be reduced by increasing the use of renewable energy sources , which should help decrease oil consumption . . If an oil spill does occur, bioremediation could be used to help remove the oil so the ecosystem may more quickly recover.
Explanation:
Which of the following are considered second messengers? (Select all that apply.)
A. Diacylglycerol (DAG)
B. Cyclic adenosine monophosphate (cAMP)
C. Norepinephrine
D. Inositol 1, 4, 5 triphosphate (IP3)
Answers
These substances are regarded as second messengers and include diacylglycerol (DAG) (option A).
What are some applications for adenosine monophosphate?Adenosine monophosphate has been reported to hasten healing, shorten the shingles pain's duration, and stop postherpetic neuralgia from occurring. More. It has been discovered that the body's naturally occurring adenosine monophosphate (AMP), which prevents shingles outbreaks, is effective.
What functions does AMP serve in the body?One of the elements of RNA, adenosine monophosphate (AMP), is also the organic portion of the ATP energy-transporting molecule. AMP joins with inorganic phosphate to produce ADP and then ATP in some crucial metabolic activities.
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the chart shows weather data for a city
Answers
The four cells produced in meiosis will have a:
a. 2n number of chromosomes and will differ genetically from each other.
b. 2n number of chromosomes and will be genetically identical to each other.
c.an number of chromosomes and will be genetically identical to each other.
d. n number of chromosomes and will differ genetically from each other.
Answers
Answer:
Here is your answer.. hope it helps u have a great day ahead
Evaluate the use of stem cells from a patient's own bone marrow instead of stem cells from an embryo.
Answers
An embryonic stem cell, which appears in the first few divided cells and has the potential to develop into any type of specialized cell. Adult stem cells, such as bone marrow, contain two types of stem cells: hemopoietic stem cells, which can produce all three types of cells, and stromal stem cells, which can only produce special muscles and bones due to their limited ability to develop specialized cells or multipotent stem cells.
Stem cells are self-renewing cells with the ability to divide into other types of cells in order to produce more stem cells. Embryonic stem cells are stem cells extracted from the inner cell mass of blastocysts during the embryonic development stage and can also be extracted from adult bone marrow to treat disease.
Stem cells are unique cells that can differentiate into various types of specialized cells.
As a result, embryonic stem cells outperform adult stem cells.
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What do stem cells do
Answers
Answer:
Stem cells are the body's raw materials — cells from which all other cells with specialized functions are generated. Under the right conditions in the body or a laboratory, stem cells divide to form more cells called daughter cells. No other cell in the body has the natural ability to generate new cell types.
Explanation:
Answer:
Stem cells are the cells from which all other cells with specialized functions are generated.
Explanation:
PLEASE HELP!!
analyze the cost vs benefit of space travel
and exploration, conduct a research report and made a short
proposal to the government with your opinion to the question
"SHOULD WE CONTINUE TO FUND SPACE
EXPLORATION"
Be sure to identify some of the specific costs, and outline in
brief detail some of the positive benefits that have come out of
space programs.
Your report should be no longer than a page. Don't forget to cite
any resources using proper APA format
Answers
The Roper Center database is rich with polls regarding government involvement in space exploration,starting as far back as the 1960s.Unfortunately, space exploration in general,and public versus private involvement in it.More recently,however,there has been an increase in the type and amount of surveys on the issue.Polls from a variety of sources such as Social Sciences Research Solutions.
The space exploration industry is in a new era,and the public seems to know what they want from it.Overall,the public is largely content with NASA's level of spending,with about equal percentages wanting to see an increase or decrease.The public also values public-private partnership more than the federal government or private enterprises working alone,altough there is reason to believe that this desired relationship places NASA in the driver's seat.There is substantial academic reasoning for the differing stances on public and/or private involvement,with real examples or input from those directly related to the industry,the support one dynamic or another.
Of two stars of spectral class B5, one has broad hydrogen lines and the other has narrow hydrogen lines. How do these stars differ physically?
Answers
The physical difference between the two stars of spectral class B5 is that the star with broad hydrogen lines has a higher temperature and faster rotation compared to the star with narrow hydrogen lines.
The width of the hydrogen lines in a star's spectrum provides information about its physical properties. In this case, the star with broad hydrogen lines indicates a higher temperature and faster rotation compared to the star with narrow hydrogen lines.
The broadening of spectral lines is primarily caused by two factors: temperature and rotation. Higher temperatures lead to increased thermal motion of particles in the star, resulting in broader spectral lines. Therefore, the star with broad hydrogen lines has a higher temperature than the star with narrow hydrogen lines.
Additionally, the rotation of a star can also affect the broadening of spectral lines. A faster rotation produces a larger Doppler shift, which leads to broader lines in the spectrum. Therefore, the star with broad hydrogen lines is likely rotating at a higher speed than the star with narrow hydrogen lines.
Overall, the presence of broad and narrow hydrogen lines in the spectra of these B5 stars suggests differences in temperature and rotation, indicating variations in their physical characteristics.
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The shape of a DNA molecule is most like A . a set of railroad tracks B . a ladder C . beads on a string D. a twisted rope ladder
Answers
A DNA molecule resembles a ladder the most in terms of form.
The correct option is B.
What is DNA and why is DNA important?DNA is a complex, long-chained molecule that contains the genetic code that directs the construction and upkeep of all living organisms. Almost all cells have DNA, which holds the instructions needed to create proteins, specific molecules essential to the development and function of the body.
What is the origin of our DNA?Half of your genome comes from your mum and half of your father, depending on who your parents are. The meiosis process is where the gametes are created. Each gamete is distinct, much like your DNA, which explains why children of the same parents don't really look alike.
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ill give brainliest just help please!!
Answers
Answer:
D
dont forget brainliest :)
Answer:
D
Explanation:
The smaller leaves do not allow the plant to create a lot of chlorophyll, thus it cannot create as much energy, making it grow slower.