Answers
Answer:
8) B
9) C
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Related Questions
Which two questions is this investigation as described,designed to answer?
Answers
Answer:
It's C and F i guess, which make any sense, sorry if the answer is wrong
Suppose there are 70 bacteria in a Petri dish at start time. Nine hours later, there are 230 bacteria in the dish. 1.) Express the number of bacteria, P, as a function of t hours passed. Note: Round the growth rate to 4 dec. places. P(t)= 2.) Use the model from part a to determine the number of bacteria, rounded to a whole number, in the dish after 14 hours:
Answers
The number of bacteria in the dish after 14 hours, rounded to the nearest whole number, is approximately 946.
1.) To express the number of bacteria, P, as a function of time, t, we can use the exponential growth formula:
P(t) = P0 * e^(rt)
Where P0 is the initial number of bacteria, r is the growth rate, and e is the base of the natural logarithm.
Given that there are 70 bacteria initially and 230 bacteria after 9 hours, we can use these data to find the growth rate, r. Rearranging the formula:
r = ln(P(t)/P0) / t
Substituting the values:
r = ln(230/70) / 9
After performing the calculations, the growth rate is approximately 0.2275 (rounded to 4 decimal places).
Therefore, the function representing the number of bacteria, P, as a function of time, t, is:
P(t) = 70 * e^(0.2275t)
2.) To determine the number of bacteria in the dish after 14 hours using the model obtained in part 1, we substitute t = 14 into the equation:
P(14) = 70 * e^(0.2275 * 14)
P(14) = 946
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scientist learn about the properties of some particles from the collisions that occur inside a
Answers
Answer:
atom or particle accelerator
Explanation:
Scientists learn about the properties of some particles from the collisions that occur inside an atom or particle accelerator.
How big is just one gigatonne of ice
Answers
Answer:
So how big is just one gigatonne? This unit of mass is equivalent to one billion metric tons, 2.2 trillion pounds, or 10,000 fully-loaded U.S. aircraft carriers. Central Park is 4 kilometers long and 0.8 kilometers wide. A gigatonne of ice placed here would extend 341 meters (1,119 feet) high.
Explanation:
hope this helps...
Photosynthesis occurs in the ______
aerobic cellular respiration occurs in the _______
and anaerobic cellular respiration occurs in the cytoplasm.
Answers
Answer:
Photosynthesis occurs in the chloroplasts aerobic cellular respiration occurs in the mitochondria and anaerobic cellular respiration occurs in the cytoplasm.
Explanation:
Don't know how to explain, but this is the right answer.
Which of the following statements are correct about archaeal histones and nucleosomes? Check All That Apply a. Archaeal nucleosomes are organized similarly to eukaryotic nucleosomes, and no comparable structure exists in bacteri
b. Histones may helo stabilize the chromosome against heat denaturation in thermophiles c. Histones are internative to supercoding for helping to compact the anche chromosome into the cytoplasm d. Nucloid assosiation are found in all organisms and therefore mustlayan essential role in chromosome e. histones and nucleosome are composed sosety of nucleic acid
Answers
The correct statements are:
a. Archaeal nucleosomes are organized similarly to eukaryotic nucleosomes, and no comparable structure exists in bacteria.
b. Histones may help stabilize the chromosome against heat denaturation in thermophiles.
a. Archaeal nucleosomes are indeed organized similarly to eukaryotic nucleosomes, with DNA wrapped around histone proteins to form a compact structure.
In contrast, bacteria lack nucleosomes or a comparable structure for organizing their DNA.
b. Histones in thermophiles, which are archaea that thrive in high-temperature environments, are known to play a role in stabilizing the chromosome against heat denaturation.
The interaction of histones with DNA helps maintain the integrity of the chromosome structure at elevated temperatures.
c. The statement that histones are alternative to supercoiling for helping to compact the archaeal chromosome into the cytoplasm is incorrect.
Histones and supercoiling are distinct mechanisms used by organisms to compact their chromosomes. Archaea primarily rely on histones for chromosome compaction.
d. Nucleoid associations are not found in all organisms. They are specific to prokaryotes (bacteria and archaea) and involve the association of DNA with various proteins to organize and compact the genetic material.
Eukaryotes, such as plants, animals, and fungi, have nucleosomes instead.
e. The statement that histones and nucleosomes are composed solely of nucleic acids is incorrect. Histones are proteins that bind to DNA to form nucleosomes.
Nucleosomes consist of DNA wrapped around histone proteins, and they are considered the basic units of chromatin in eukaryotes and archaea.
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in angiosperms, the process of ensures that the endosperm will develop only in ovules containing a fertilized egg. a) cytogenesis b) fragmentation c) double fertilization d) meiosis
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In angiosperms, the process of double fertilization ensures that the endosperm will develop only in ovules containing a fertilized egg.
The angiosperms plants' distinctive property is double fertilization. Pollen grains are left on the stigma of the pistil or carpel after pollination. A pollen tube is created when the pollen grain on the stigma germinates. Two male gametes are released when the pollen tube that contains them descends through the pistil's style and enters the ovule's embryosac.
One of the gametes combines with the egg to create the zygote. The other male gamete fuses with the embryo sac's two polar nuclei. Triple fusion is the name given to the fertilization between two polar nuclei and one male gamete. Upon triple fusion, triploid primary endosperm cells are produced (3n).
The complete question is:
In angiosperms, the process of _________ ensures that the endosperm will develop only in ovules containing a fertilized egg.
a) cytogenesis
b) fragmentation
c) double fertilization
d) meiosis
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why does garbage have to be burned in the annex
Answers
Garbage has to be burned in the annex for a few reasons:
Burning garbage reduces the amount of waste that needs to be disposed of in landfills. Burning garbage can also generate energy, which can be used to power homes and businesses. Burning garbage can help reduce the spread of disease, as it destroys harmful bacteria and viruses that may be present in the waste.In the annex, garbage is typically burned in an incinerator, which is a specially-designed furnace that is able to safely and efficiently burn waste. The incinerator is equipped with pollution control devices that prevent harmful chemicals from being released into the atmosphere.
Overall, burning garbage in the annex is an important part of waste management and helps to reduce the environmental impact of garbage disposal.
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Postery
2
5. An urban or city forest is an area that is planted with trees all around the city. Justify the idea of
a city forest in terms of preserving a balanced ecosystem.
Answers
Answer:
The correct answer is - it helps not just in the beautification of the city but impacts climate by reducing pollution and smog and temperature and many more ways to a balanced ecosystem.
Explanation:
A city forest or urban forest is an area that has plants and trees planted all over the city. This helps a city in various including the beauty of the city to various positive roles impacting the ecosystem and help the climate and ecosystem balanced.
Such cities help in developing natural habitat for the flora and fauna and habitat for the wild animals who lose their habitat due to city of concrete. It also helps in reducing heat by reducing carbon dioxide and increasing oxygen in nature.
this video shows the movement of oil near the site of the 2010 oil spill. what happens to the oil after it’s spilled.
Answers
Oil spill has detrimental effects on the environment.
During transportation of oil, the leakage of oil that occurs in the water bodies, specifically in the oceans and seas is referred to as oil spill.
This spilled oil floats on the surface of water. This oil has effects on aquatic animals as well as the birds that hover around the water bodies. For instance, if the feathers of the seabirds get oiled, the birds can die of hypothermia. Many fishes and planktons die because of the oil spilled.
The oil droplets present on the surface are degraded by the process of photooxidation that happens due to exposure to light and oxygen. This also results in the formation of free radicals that are harmful to the water body as well as to the organisms present in water.
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Why is the sky blue? I know it’s a generic question but I honestly don’t know
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Answer:
As sunlight passes through the atmosphere, particles in the air scatter blue light more efficiently than any other color in the light spectrum, creating a blue sky.
Explanation:
What was the purpose of the Kinetic energy lab, the importance of the topic, and the question you are trying to answer? Ed genuity
Answers
Answer:
It is important to learn about, and very interesting. I would still like to learn more about it!
Explanation:
Why is potassium permanganate used in diffusion experiment?
Answers
Answer: Potassium permanganate used in diffusion experiment
Explanation: Because of the random movement of potassium permanganate particles, a dense purple solution forms in water at base of the beaker. The purple solution will slowly spread into the rest of the water throughout the beaker creating a less dense but evenly colored purple solution.
Is a homologous pair of chromosomes a tetrad?
Answers
The homologous chromosome pairs, also known as bivalents or tetrads, line up along the metaphase plate in a random order during metaphase I of meiosis I.
They are known as homologous pairs of chromosomes. When homologous chromosomes line up next to one another during meiosis, they create a tetrad. Two homologous chromosomes make into a tetrad, which has four sister chromatids altogether and is held together by a feature known as the chiasmata. When two homologous chromosomes that have already duplicated their DNA link up, they form a tetrad. The main distinction is that a tetrad consists of two homologous chromosomes that resemble an X rather than an I. A pair of two chromosomes, usually one from the mother and one from the father.
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In an animal, which part of the cell is responsible for keeping viruses out?
Answers
Answer:
here's your answer
Explanation:
Once attached to a host cell, animal viruses may enter in a variety of ways: by endocytosis, where the membrane folds in; by making channels in the host membrane (through which DNA or RNA can be injected); or, for enveloped viruses, by fusing with the membrane and releasing the capsid inside of the cell.In an animal cell, the lysosome is an organelle of the cell that is responsible for destroying the virus. The virus can enter the cell via endocytosis, but the lysosome can degrade and destroy it to protect the cell.
What is the function of the immune cell?Immune cells such as neutrophils, macrophages, and others play a role in protecting the body from foreign harmful pathogens. They have specific structures for doing so.
Because not all body cells have MHC II or toll-like receptors, cells have different organelles to protect themselves. Cells have lysosomes within them. Lysosomes have an acidic environment that can degrade viral proteins.
When the virus is phagocytosed by the cell, it combines with the lysosome. The lysosome degrades the virus with the help of hydrolyzing enzymes and throws it out of the cells. These are collected by other cells.
Hence, the lysosome of the cell degrades the virus and keeps it out.
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Where photosynthesis takes place
Photosynthesis
Products
Chloroplasts
Reactants
Glucose
Answers
Answer:
I believe it's chloroplast
Explanation
The science of genetics has demonstrated repeatedly:
1. that variation is the result of speciation
or
2. that variation among species is not the result of evolution
Answers
Answer:
Explanation:
1.Variation is the result of speciation as species have evolved over time to adapt to enviromental changes
A soil associated with the hot and wet tropics is _____.
Answers
Explanation:
A soil associated with the hot and wet tropics is laterite
After hunting by European settlers, the bison population of 60 million was reduced to _______ of its original size. a. 1 : 60 b. 1 : 600 c. 1 : 6,000 d. 1 : 60,000 Please select the best answer from the choices provided A B C D
Answers
Answer: The correct answer is D. After hunting by European settlers, the bison population was reduced to 1:60,000 of its original size.
Explanation:
Answer:
D
Explanation:
A population of 40 deer are introduced into a wildlife sanctuary. It is estimated that the sanctuary can
sustain up to 600 deer. Absent constraints, the population would grow by 60% per year. Estimate the population
after one year Pi Estimate the population after two years P2 -
Answers
The population of deer in the wildlife sanctuary can be estimated using the formula:
P(t) = P(0) * (1 + r)^t
where P(t) is the population after t years, P(0) is the initial population, r is the growth rate per year, and t is the number of years.
In this case, the initial population (P(0)) is 40 deer, the growth rate (r) is 60% per year (0.60), and we need to estimate the population after one year (P1) and two years (P2).
To calculate P1:
P(1) = 40 * (1 + 0.60)^1
P(1) = 40 * (1 + 0.60)
P(1) = 40 * 1.60
P(1) = 64
Therefore, the estimated population after one year is 64 deer.
To calculate P2:
P(2) = 40 * (1 + 0.60)^2
P(2) = 40 * (1 + 0.60)^2
P(2) = 40 * 1.60^2
P(2) = 40 * 2.56
P(2) = 102.4
Therefore, the estimated population after two years is 102.4 deer.
It's important to note that these are estimates and assume that there are no constraints on the population growth. In reality, factors like limited resources, predation, and disease can affect the growth rate and population size.
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Which is one effect that would most likely result from a tsunami?
death
drought
extinction
genetic change
Answers
Answer: Death would be your answer.
Explanation: Hope this helps!
Answer:death
Explanation:
who validated Darwin’s theory of natural selection through his observations of generations of fruit flies
Answers
Thomas Hunt Morgan, an American geneticist, is frequently credited with using fruit flies in his research to experimentally validate the hypothesis of natural selection.
Fruit flies (Drosophila melanogaster) were utilized by Morgan and his Columbia University students to research genetics and inheritance in the early 20th century.
They discovered that some characteristics, including eye color and wing shape, were passed down from one generation to the next and that the frequency of these characteristics fluctuated with time. Additionally, they discovered that some features appeared to be more prevalent in particular populations of fruit flies, which appeared to be the result of natural selection.
These findings served to validate Darwin's theory of natural selection and establish genetics as a legitimate scientific field.
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Right now we have the ability for genetic modification (plants, animals, diseases, or humans). Discuss a positive or a negative use and whether you agree or disagree with it.
Answers
Answer:
There are pros and cons in genetic modification.
Explanation:
Pros: It will help with plant growth and because of global warming it can help keep the plants alive. It can also help cure some diseases and help humans stay alive with what is coming for us in the future.
Cons: If we do this, we would gain more diseases and have new mutations going on in the world. The Plants may mutate and we may lose some types of animals to new diseases.
What type of microscopy was crucial for visualizing viral particles?
Answers
The type of microscopy that is crucial for visualizing viral particles is electron microscopy. This type of microscopy uses a beam of electrons instead of light to create a magnified image, allowing for much higher resolution and the ability to see objects as small as viral particles.
A microscope that uses an electron beam to provide illumination is referred to as an electron microscope. An optical light microscope's glass lenses are analogous to the electron optics they employ. Electron microscopes have a resolution of about 0.1 nm, which is higher than that of light microscopes, which have a resolution of about 200 nm due to the wavelength of an electron being up to 100,000 times shorter than that of visible light.
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urine moves through the ureters by means of gravity and
Answers
Urine moves through the ureters by means of gravity and peristalsis.
Urine is a liquid waste product produced by the kidneys as they filter blood and remove excess water, salts, and other waste substances. After the kidneys produce urine, it must be transported to the urinary bladder for storage and eventual elimination from the body. The ureters are the tubes that connect the kidneys to the bladder and facilitate this process.
The movement of urine through the ureters involves two main forces: gravity and peristalsis. Gravity plays a role as it pulls the urine downward towards the bladder, following the natural direction of the ureters. However, gravity alone is not sufficient for the effective transport of urine. To ensure that urine continues to flow smoothly and consistently, the walls of the ureters also undergo a process called peristalsis.
Peristalsis is the involuntary, wave-like contraction and relaxation of the smooth muscle within the walls of the ureters. These muscle contractions push the urine forward, creating a steady flow towards the bladder. This process prevents urine from flowing backward, known as reflux, which could potentially damage the kidneys or cause infection.
In summary, urine moves through the ureters by means of gravity and peristalsis. Gravity assists in pulling the urine downward, while peristaltic contractions of the ureter walls maintain a consistent and unidirectional flow towards the bladder for proper storage and eventual elimination.
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differentiate between a microaerophile and an aerotolerant organism
Answers
Microaerophiles and aerotolerant organisms are two types of bacteria that have different oxygen requirements for growth and survival.
Microaerophiles are bacteria that require a low level of oxygen (around 5-10%) for growth and survival. They are unable to grow in environments with high levels of oxygen, such as the atmosphere (which is around 21% oxygen). These bacteria have adapted to live in environments with low oxygen levels, such as in the gastrointestinal tract of animals.
On the other hand, aerotolerant organisms are bacteria that can tolerate exposure to oxygen but do not require it for growth. They can grow in the presence or absence of oxygen, but do not use oxygen as a terminal electron acceptor in their metabolic pathways. These bacteria have adapted to live in environments with fluctuating oxygen levels, such as soil or the human mouth.
A microaerophile is a type of microorganism that requires oxygen to survive but can only tolerate low concentrations of it, typically around 2-10%. These organisms have a limited capacity to deal with toxic oxygen by-products, so high oxygen concentrations are harmful to them. Examples of microaerophiles include Campylobacter and Helicobacter species.
An aerotolerant organism, on the other hand, does not require oxygen for growth but can survive and grow in the presence of oxygen. These organisms are typically anaerobic, meaning they do not use oxygen in their metabolic processes. However, they possess defense mechanisms that allow them to tolerate the presence of oxygen without being harmed. Examples of aerotolerant organisms include certain species of Lactobacillus and Streptococcus.
microaerophiles require low levels of oxygen for growth, while aerotolerant organisms can grow without oxygen but can tolerate its presence.
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What is a reproductive strategy?
a.) The way that a species creates offspring b.)The way that an organism hunts for food c.)The number of alleles an organism passes on d.) The DNA that is passed onto an offspring
Answers
Answer:
I am pretty sure that the answer is (a) The way that a species creates offspring.
Explanation:
The term reproductive strategy is loosely used to refer to the way an animal mates and/or raises offspring.
Which group was not described in Woese's tree of life analysis?
View Available Hint(s)
a. Prokarya
b. Archaea
c. Bacteria
d. Eukarya
Answers
Woese's analysis of a tree of life did not include prokarya among the categories it described.
What does analysis mean example?the process of closely scrutinizing something in order to learn more about it or form an opinion and judgment after doing so: An unbiased assessment of the results of the investment plan was done by our financial specialists. Clare's interpretation of the issue piqued my interest.
What is a analysis in writing?Your chance to contextualize or explain the evidence for your reader is during analysis. You may explain to a readers the importance of the evidence, what it means, and how it connects to other concepts in your work in your analysis.
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The blueprints for structural organization and metabolism are contained in ____, and the offspring receive copies of these instructions ___.
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The blueprints for structural organization and metabolism are contained in the Deoxyribonucleic Acid (DNA), and the offspring receive copies of these instructions through the process of inheritance or genetic transmission.
DNA is a molecule found in the cells of living organisms and serves as a repository of genetic information. It carries the instructions necessary for the development, functioning, and reproduction of organisms. During reproduction, genetic material is passed from parent to offspring, ensuring the transmission of the blueprint for structural organization and metabolism from one generation to the next. DNA is made of two linked strands that wind around each other to resemble a twisted ladder — a shape known as a double helix.
Heredity, also called inheritance or biological inheritance, is the transmission of traits from parents to their offspring; either through asexual reproduction or sexual reproduction, the offspring cells or organisms acquire the genetic information of their parents.
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The release of water from the vacuoles of the cells caused the plant to wilt and droop. The in the plant's cells helps the plant to maintain its structure during this period of stress.
Answers
Answer:
Vacuole; Cell wall
Explanation:
The release of water from the VACUOLES of the cells caused the plant to wilt and droop. The CELL WALL in the plant's cells helps the plant to maintain its structure during this period of stress.
Vacuoles are organelles which help in the storage of fluids which may include water, digestion and excretion(release) of excess water in the cells.
Cell walls on the other hand helps to provide structural support in plants and usually surrounds the membranes on the outer part.