mitosis
takes one cell and replicates it into two genetically identical cells.
takes two cells one from each parent and replicates it into four genetically unique cells.
takes one cell and replicates it into four cells each with half of the original cell's genetic information.
takes one cell and replicates it into two genetically unique cells.
Answers
Mitosis takes one cell and replicates it into two genetically identical cells (option A).
What is mitosis?Mitosis is the division of a cell nucleus in which the genome is copied and separated into two identical halves. It is normally followed by cell division.
Mitosis is one of the two types of cell division that results in the formation of four daughter cells that are genetically identical to one another.
Mitosis is also called duplication division because it does not change the number of chromosomes of the parent cell.
Therefore, option A is the correct option
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Answer:
Mitosis takes one cell and replicates it into two genetically identical cells.
Related Questions
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Deforestation is the second leading cause of global warming (climate change) worldwide, and it produces about 24% of global greenhouse gas emissions. Deforestation in the tropical rainforests contributes more carbon dioxide to the atmosphere than the sum of all cars and trucks that drive on the world’s roads.
Why would deforestation this lead to more carbon dioxide?
a
The changed habitats support more animals, like native birds and mammals, that produce more carbon dioxide.
b
The increased amount of timber harvested produces oxygen gas, which encourages the wildlife to generate carbon dioxide.
c
Loss of trees leads to a decrease of the ability of forests to act as carbon sinks to remove carbon dioxide from the atmosphere.
d
Equipment used for clear-cutting produce metric tons of carbon dioxide, which is released into the atmosphere during the process of deforestation
Answers
Answer:
C
Explanation:
According to Worldwildlife.org, Forest play a critical role in mitigating climate change because they act as a carbon sink - soaking up carbon dioxide that otherwise be free in the atmosphere and contribute to ongoing changes in climate patterns.
Which part of interphase involves the cell growing, collecting nutrients, and copying some of the organelles?
Answers
The G1 phase of interphase involves the cell growing, collecting nutrients, and copying some of the organelles. G1, S, and G2 are the three stages that make up interphase.
The G1 phase of interphase is the first phase. In G1, the cell grows, collects nutrients, and copies some of the organelles. During this stage, the cell determines whether or not it is ready to proceed to the next stage of the cell cycle, which is the S phase.If the cell decides to move on to the S phase, it will do so.
During the S phase, the cell replicates its DNA. The G2 phase is the final phase of interphase. During this stage, the cell continues to grow and develop. Additionally, the cell continues to prepare for the next phase of the cell cycle, which is mitosis. Therefore, G1 is the stage of interphase where the cell grows, collects nutrients, and copies some of the organelles.
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genetic drift is a change in allele frequencies produced by . choose one: a. directed differences in survival and reproduction among individuals in a population. b. random differences in survival and reproduction among individuals of different species. c. random differences in survival and reproduction among the individuals in a population. d. random differences in survival and reproduction among individuals in different populations.
Answers
The correct answer is c. random differences in survival and reproduction among the individuals in a population.
Genetic drift is a mechanism of evolution that refers to the random fluctuations in allele frequencies within a population over time. It occurs when certain alleles become more or less common in a population due to chance events rather than natural selection. These chance events can include random differences in survival and reproduction among individuals in a population, which can lead to the random loss or fixation of alleles. Genetic drift is particularly influential in small populations where chance events can have a more significant impact on allele frequencies.
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What term is used for the muscles and glands whose activities are controlled by nervous activity?
Answers
What kind of mutation occurred in the DNA sequence below?
AGA – GGA – CCT original DNA sequence
AGA – GGG – ACC mutated DNA sequence
ANSWER CHOICES
-----
A -Nondisjunction
B - Substitution
C - Insertion
D - Deletion
Answers
Answer:
Substitution
Explanation:
Substitution is when one base replaced another which is what has happened here with A turning into G and T turning into a C.
The reason(s) why glucose oxidation occurs in multiple, enzyme catalyzed steps that result in small chemical transformations is/are
Answers
The reason why glucose oxidation occurs in multiple, enzyme-catalyzed steps that result in small chemical transformations is to efficiently harness the energy stored in glucose molecules.
Breaking down glucose in small steps allows the energy released from each step to be captured and stored in molecules like ATP, which can then be used by cells for various metabolic processes. Additionally, breaking down glucose in small steps also helps to prevent a large, uncontrolled release of energy that could be damaging to the cell.
Enzymes are used to catalyze each step of glucose oxidation, allowing for precise control over the process and ensuring that each step occurs at the appropriate rate. Overall, this highly regulated process of glucose oxidation enables cells to efficiently convert the energy stored in glucose into a form that can be used for cellular activities.
The process of glucose oxidation occurs in multiple, enzyme-catalyzed steps that result in small chemical transformations because it allows for greater control and efficiency of energy release. Glucose is a complex molecule, and the breakdown of its chemical bonds releases a significant amount of energy that can be used by the cell.
However, releasing all of that energy at once would be inefficient and potentially harmful to the cell.
By breaking down glucose into smaller, more manageable pieces through a series of controlled steps, the cell can harness the energy released in a controlled manner and use it to power various cellular processes.
The use of enzymes also allows for the regulation of these steps, ensuring that they occur only when needed and at the appropriate rate.
In addition, the multiple steps of glucose oxidation allow for the production of ATP, the primary energy currency of the cell, in a more efficient manner.
ATP production is coupled with the release of energy from the breakdown of glucose, so breaking down glucose into smaller pieces allows for more ATP to be produced for each molecule of glucose oxidized.
Overall, the multiple, enzyme-catalyzed steps of glucose oxidation are necessary for the efficient release and utilization of the energy stored in glucose, while also providing tight regulation and control over the process.
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The trait for 'black feet in ferrets' is a recessive trait encoded for by "f". white feet is encoded for by a dominant allele encoded for by the letter "f".
an ecological study in ferret country conducted by mrs. wright found that out of 1000 ferrets:
360 had black feet
480 had white feet and were heterozygous
160 had white feet and were homozygous.
using this information find the allele frequencies for f and f.
remember "f" = p and "f" = q
a
f = 0.4 and f =0.6
b
f = 0.7 and f = 1
c
f = 1 and f =0.7
d
f = 0.7 and f =0.3
Answers
For the trait for 'black feet in ferrets' is a recessive trait encoded for by "f". white feet is encoded for by a dominant allele encoded for by the letter "f" the sum of the frequencies for f and f all alleles must equal 1.
Let's calculate the frequency of the f allele (p):
The 360 ferrets with black feet are homozygous recessive (ff), so the frequency of the f allele is sqrt(360/1000) = 0.6
The 480 heterozygous ferrets (Ff) have one f allele each, so the frequency of the f allele is 480/1000 x 0.5 = 0.24
The 160 homozygous dominant ferrets (FF) have no f alleles, so the frequency of the f allele is 0.
The sum of the frequencies of f and F is 1, so the frequency of the F allele (q) is:
q = 1 - p = 1 - 0.6 = 0.4
Therefore, the answer is (a) f = 0.4 and f = 0.6.
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A student measured oxygen and carbon dioxide concentration levels in an aquatic ecosystem during a 24 hour period. Identify two biological processes that are responsible for the production of varying amounts of carbon dioxide and oxygen within the aquatic ecosystem.
Answers
Aquatic ecosystems are habitats found in water bodies such as ponds, rivers, lakes, and oceans. They are characterized by various living and non-living components .
Carbon dioxide and oxygen are two vital gases that aquatic organisms rely on for survival, but their concentration levels within an aquatic ecosystem may vary depending on the biological and environmental factors.
Photosynthesis is the process by which green plants and some microorganisms use sunlight to convert carbon dioxide and water into oxygen and organic compounds, which are then used to synthesize other important compounds.
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When a pathogen or bacteria is recognized, 2 types of cells are created in abundance. Briefly describe what they do.
a) Effector Cell:
b) Memory Cell:
Please help me.
Answers
When a pathogen or bacteria is recognized by the immune system, the adaptive immune response is activated, leading to the production of two main types of cells: effector cells and memory cells.
a) Effector Cell: Effector cells are responsible for carrying out the immediate response to eliminate the pathogen or bacteria. In the context of the adaptive immune response, there are two primary types of effector cells being Cytotoxic T cells (CD8+ T cells) & B cells.
b) Memory Cell: Memory cells are long-lived cells that "remember" the specific antigen from a previous encounter with a pathogen or bacteria. They are derived from the same activated cells that give rise to effector cells. If the same pathogen is encountered again in the future, memory cells can quickly respond and initiate a faster and more effective immune response.
Explain why every cell that is produced from the genetically modified bacterium
will be able to produce insulin.
Answers
Answer:
Recombinant DNA is technology scientists developed that made it possible to insert a human gene into the genetic material of a common bacterium. This “recombinant” micro-organism could now produce the protein encoded by the human gene. Scientists build the human insulin gene in the laboratory. Then they remove a loop of bacterial DNA known as a plasmid and insert the human insulin gene into the plasmid. Researchers return the plasmid to the bacteria and put the “recombinant” bacteria in large fermentation tanks. There, the recombinant bacteria use the gene to begin producing human insulin. Scientists harvest the insulin from the bacteria and purify the substance for use as a medicine for people.
Explanation:
100 PTS——-Describe a specific detrimental human impact to a particular ecosystem and propose a solution to reduce the harmful effects over time. Explain how your proposed solution will work to minimize effects in that ecosystem.
Answers
Answer: human trash
Explanation:
Because we leave or trash and it decomposes into harmful air or water
if dna was loaded at the top of a gel but the positive and negative poles were accidentally reversed, what would happen? a. all of the dna molecules would move towards the top of the gel. b. all of the dna molecules would move towards the bottom of the gel. c. small dna molecules would move towards the top of the gel and large dna molecules would move towards the bottom of the gel. d. small dna molecules would move towards the bottom of the gel and large dna molecules would move towards the top of the gel.
Answers
All of the DNA molecules would move to the top of the gel if DNA was loaded at the bottom of a gel but the positive and negative poles were accidentally switched. So option A is the right answer.
DNA fragments of different lengths can be distinguished using electrophoresis. When an electric current is applied to the gel, DNA will migrate toward the positively charged electrode because it is negatively charged. Because shorter DNA strands move through the gel more quickly than longer ones, the DNA fragments are arranged in size order. Due to their negative charges, DNA and RNA are drawn toward the positively charged end of the gel.
Therefore, if DNA were placed at the top of the gel but the positive and negative poles were accidentally switched, we can say that all DNA molecules would move to the top of the gel.
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Explain what are some examples of internal structures that allow organisms to survive in their environment?
Answers
Answer:
Plants and animals have many structures that help them survive. Some structures are internal, like the lungs, brain, or heart. Other structures are external, like skin, eyes, and claws. ... Other structures are more common, like a heart.
Explanation:
Answer:
lungs, fat, skeletal system
Explanation:
genetic conditions caused by an unexpected (or abnormal) number of chromosomes, like down syndrome or an unexpected combination of sex chromosomes (xxy, xxy, and xo) are known as
Answers
Genetic conditions caused by an unexpected (or abnormal) number of chromosomes, such as Down syndrome or an unexpected combination of sex chromosomes (XXY, XYY, and XO), are known as chromosomal abnormalities.
What is a chromosomal abnormality?
A chromosomal abnormality is a kind of genetic disease that results from an atypical number or structure of chromosomes in the body's cells. In most circumstances, individuals with chromosomal abnormalities have 46 chromosomes in each of their cells, with two chromosomes inherited from each parent. However, some people have an extra chromosome or are missing one of them. Some chromosomal abnormalities are heritable, while others occur spontaneously.A chromosomal abnormality might occur in an entire chromosome or a small section of it. It may also entail an entire set of chromosomes. Chromosomal abnormalities can cause a variety of diseases, syndromes, and other health issues, ranging from mild to severe. Down syndrome is one of the most well-known chromosomal abnormalities.
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10. What is a situation where mtDNA might be used? (1 point)
-when there is a large amount of nuclear DNA
-on the teeth and bones of skeletonized human remains
-on a victim who has just died
-when blood is present at the scene
Answers
Answer: On the teeth and bones of skeletonized human remains.
Q9
Which of the following statements about cortisol is FALSE?
a.
cortisol promotes protein catabolism in muscle
b.
cortisol has a permissive effect on glucagon and
catecholamines
c.
stress and circadi
Answers
The statement about cortisol that is FALSE is that "cortisol promotes protein catabolism in muscle."
Cortisol is a steroid hormone that is produced by the adrenal gland. It is often called the stress hormone because it is released in response to stress and anxiety. Cortisol has several effects on the body, including increasing blood sugar levels, suppressing the immune system, and promoting the breakdown of fats and carbohydrates for energy. However, cortisol does not promote protein catabolism in muscle.
In fact, cortisol has the opposite effect on muscle tissue. It promotes protein breakdown in other tissues in the body to provide amino acids for gluconeogenesis and other metabolic processes, but it actually helps to preserve muscle mass by reducing the amount of protein breakdown that occurs in muscle tissue. Therefore, option A is the statement about cortisol that is FALSE.
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think about repeating the experiment in an airless tube, or vacuum. would this change the results? explain your answer.
Answers
It depends on the specific experiment being performed. Conducting an experiment in a vacuum or airless tube can change the conditions under which the experiment is performed and potentially affect the results.
In general, removing air or reducing the pressure can eliminate air resistance, which could be a significant factor in experiments involving objects moving through a fluid medium. This can result in increased speed or changes in the trajectory of the object being studied. For example, a ball dropped in a vacuum will fall faster than the same ball dropped in air due to the absence of air resistance.
Similarly, experiments involving combustion, such as burning a material, can be affected by the presence or absence of oxygen in the air. Removing oxygen by performing the experiment in a vacuum or airless tube can change the rate of combustion or even prevent it from occurring.
On the other hand, in some cases, air or other gases may play a critical role in the experiment. For example, certain chemical reactions may require the presence of specific gases, and removing them by performing the experiment in a vacuum could prevent the reaction from occurring.
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Are there any mammalian cells that would be a good source for dividing cells? What types of cells would most like NOT have cells undergoing division?
Answers
Answer:
Skin cells, bone cells
Explanation:
1. Skin cells are constantly being replaced, so it's likely they will be undergoing Mitosis.
2. Bones grow very slowly, and can last for years, which means that it's unlikely they will be undergoing mitosis.
There are a couple of mammalian cells that would be a good source for dividing cells. They include but not limited to:
The cells of the skinCells in the bone marrowThe cells of the skin adjacent to the environment are constantly being replaced by cell division due to death relating to environmental factors.
The cells in the bone marrow are also dividing constantly because old blood cells are constantly being replaced.
Some cells in the human body do not divide ordinarily, unless they are called upon to do so on special circumstances. For example, the cells of the heart stop dividing once the heart gets to a particular size. The cells enter the quiescent stage of the cell cycle and they are only called upon to divide in case an injury occur to the heart and it needs to repair itself.
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How will this most likely affect the rabbit population on the island? There will be fewer predators that eat the rabbits, so the rabbit population will quickly grow. Other animals will eat less food, so the rabbit population will remain stable. The rabbits will adapt to eating very little food, so the population will increase slowly over time. Few rabbits will be able to find food, so the population will die off and become extinct.
Answers
The rabbit population on an island will most likely grow rapidly as there will be fewer predators that eat the rabbits. Therefore, option A is the correct answer. Here is a detailed explanation of how the reduction in predators may affect the rabbit population on an island:
Rabbits are prey to many animals that live on the island. With the reduction in predators that eat the rabbits, it's most likely that the rabbit population will grow rapidly. There will be fewer rabbits being hunted, which will lead to an increase in their population.
The growth in the rabbit population will bring about changes in the island ecosystem. Since the rabbits will not have many predators, they will have more food to eat. They will have more food sources to choose from, and they will no longer be competing for resources with other animals that are also predators.
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Explain how a palisade mesophyll cell is adapted for its function
Answers
Palisade mesophyll cells are closely sealed to soak maximum light. They are at right angles to the leaf surface to reduce the number of transverse walls. A large vacuole pushes the chloroplast to the edge of the cell.
Chloroplasts at the edge enable a shorter diffusion path for carbon dioxide and absorb maximum light. There are cylindrical cells and air spaces to provide a store of carbon dioxide. These cells provide a large surface area and moist cell surface for easy diffusion of gases. Chloroplasts in these cells can move towards light and move away from high light intensity to avoid damage.
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The circulatory system works with the integumentary system to maintain body temperature. The integumentary system controls things like sweating and shivering while the circulatory system controls what?
A. vasodilation and vasorestriction.
B. delivery of nutrients.
C. delivery of oxygen.
D. waste removal.
Answers
Answer:
D
Explanation:
The circulatory system is made up of blood vessels that carry blood away from and towards the heart. Arteries carry blood away from the heart and veins carry blood back to the heart. The circulatory system carries oxygen, nutrients, and hormones to cells, and removes waste products, like carbon dioxide.
primary structure of protein
Answers
The primary structure of a protein is the linear sequence of amino acids that make up the protein chain. The sequence is determined by the genetic code of the organism, which specifies the order of the amino acids in the protein.
The number of polypeptide chain together form proteins. these chain contain amino acid arranged in a particular sequence which is characteristic of the specific protein. Any change in the sequence changes the entire protein.
There are 20 different types of amino acids that can be found in proteins, and the order and type of amino acids determine the unique properties and functions of each protein. The primary structure of a protein is usually denoted by a string of letters that represent the amino acids in the sequence.
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What happens during fertilization that makes the offspring unique compared to the original cells?
Please write the answer in one sentence!
And please, if you do not know the answer, please don´t answer.
Answers
Answer:
The union of an egg and sperm forming a zygote is known in biology as fertilization, during this process the zygote becomes a morula, meaning that the female reproductive cell divides after that union generating many other cells together into a solid ball of cells, giving rise to the embryo with the potential for development, fostered by chemical reactions among the sperm enzymes and the egg's plasma; mitosis and meiosis are included throughout the whole process.
measles viruses are capable of inactivating host defenses by measles viruses are capable of inactivating host defenses by suppressing the immune system. producing superantigens. producing leukocidins. destroying complement proteins.
Answers
Measles viruses are capable of inactivating host defenses by Suppressing the immune system.
The immune system is temporarily and profoundly suppressed by MV infection, making the patient more vulnerable to opportunistic infections and increasing the risk of child mortality. The virus reproduces quickly in lymphoid tissues. Tertiary lymphoid tissues like BALT and gut-associated lymphoid tissues (GALT) can be triggered by a bacterial or viral infection that causes lymphocytes to accumulate and grow and germinal centers to form.
Droplets that are released into the air by coughing or sneezing can spread the disease. Symptoms of measles do not begin until 10 to 14 days after exposure. They include a red, blotchy skin rash, fever, runny nose, inflamed eyes, sore throat, and cough.
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Which of these is the function of the large central vacuole?
Reproduction of the cell
Production of ATP
storage
Energy production
Answers
I need help with this practice problem solving In your words, give a short summary to my pic
Answers
Answer: The English settlers brought it over from England when they brought supplies to start a new life over
Explanation:
A population of 500 beetles is expected to grow at a rate of 70% per week. Which number is the best prediction of the population after 15 weeks?.
Answers
The best prediction of the population after 15 weeks will be 1,431,212 beetles.
What is the population growth ?The average annual rate of change in population size for a given country, region, or region over a given period. It represents the annual growth rate of the population as a percentage of the total population for that year, usually multiplied by 100.
Population growth is the increase in the number of people within a population or dispersed group.
To calculate total population:
The total number of beetles = 500
The rate of population increase = 70% per week
So, 70% of 500= 70/100 × 500
= 35000/100
= 350 per week.
This means there will be additional 350 beetles every week,
That is = 500 + 350 = 850 beetles
850/500 = 1.7 times the initial population
Therefore in 15 weeks = 500× 1.7¹⁵
= 500 × 2862.4231
= 1,431,212
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Eukaryotic cells have their chromosomes packaged in the ________. Eukaryotic cells have their chromosomes packaged in the ________. nucleus centriole nucleolus Golgi apparatus
Answers
Eukaryotic cells have their chromosomes packed in the nucleus.
Eukaryotic chromosomes are located inside the cell's nucleus. The principal function that distinguishes a eukaryotic cell from a prokaryotic cell is the presence of a membrane-bound nucleus. This nucleus is the “control center” of the cell that stores all of the cellular's genetic records, or DNA.
In eukaryotes, however, genetic material is housed inside the nucleus and tightly packaged into linear chromosomes. Chromosomes are made of a DNA-protein complex called chromatin which is prepared into subunits called nucleosomes.
All eukaryotes have a well-described nucleus that consists of DNA. DNA is a negatively charged polymer, packed compactly inside the chromatin, engirdling the histone proteins, a ball of positively charged proteins. The octamer of histone proteins is wrapped with a DNA helix, giving rise to a structure known as nucleosomes.
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how could producing urease support the survival of a bacterium colonizing the stomach, such as helicobacter pylori g
Answers
Producing urease in the stomach could enable Helicobacter pylori G to survive by breaking down urea molecules into carbon and ammonia sources of energy.
What is Helicobacter pylori G?Helicobacter pylori G (H. pylori G) is a type of spiral-shaped bacterium that is commonly found in the stomach and can cause gastric ulcers and other gastrointestinal diseases. H. pylori G has been studied as a potential microbial cause of certain diseases, and research suggests it might also be involved in diseases such as gastritis, peptic ulcers, and stomach cancer. It can be identified through laboratory tests and antibiotics can be used to treat H. pylori G infections.
What are gastrointestinal diseases?Gastrointestinal diseases, also known as digestive diseases, are conditions that affect the functioning of the intestine (including the stomach, small intestine, colon, and rectum). They can be caused by a variety of factors, ranging from bacteria and viruses to dietary choices, genetics, and even stress. Common symptoms of gastrointestinal diseases include abdominal pain and cramping, nausea and vomiting, as well as diarrhea and constipation. Treatment often includes dietary changes, medications, and other lifestyle modifications.
Urease breaking down urea molecules converts ammonia, which is toxic in high concentrations, into carbon dioxide and water which can be used in biosynthesis for energy and growth. This helps the bacterium colonize the stomach and survive in its environment.
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Hardwired characteristics of the brain that attempt to keep us in balance by correcting deficiencies are referred to as:
Answers
Hardwired characteristics of the brain that attempt to keep us in balance by correcting deficiencies are referred to as homeostatic mechanisms.
Homeostasis is the body's ability to maintain a stable internal environment despite external changes.
In the context of the brain, homeostatic mechanisms involve various processes that regulate physiological functions and maintain optimal levels of essential substances.
These mechanisms can include feedback loops that detect imbalances and initiate corrective actions.
For example, if there is a deficiency in a particular nutrient or hormone, the brain may activate mechanisms to increase its production, decrease its consumption, or enhance its absorption from the environment.
Homeostatic mechanisms play a crucial role in ensuring the body's overall stability and functioning, helping to maintain proper levels of various substances and promoting overall well-being.
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