During which phase of meiosis is the chromosome number reduced?

Answer:

1 fertile rat and her subsequent offspring can compound exponentially into well over a million rats in under a year. That being said, the survival and reproduction rates cant reach there max typically due to limited resources or predation.

Answer:

as we know it alot of people kill rats and always put poison on them. the rats that live on from being poison will not be able to reproduce because they will kill the female rat or die later on

Explanation:

Answer:

Lysosomes get rid of waste in the cells.

Answer: ! ' 23, ,

the answer is C,

Explanation:

The answer is lysosome. I believe that the answer is C because this is how the lysosome works: A lysosome is a membrane-bound cell organelle that contains digestive enzymes. Lysosomes are involved with various cell processes. They break down excess or worn-out cell parts. They may be used to destroy invading viruses and bacteria.

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Answer:

magnetic field.

Explanation:

The invisible area around a magnetic object that can pull another magnetic object toward it or push another magnetic object away from it is called a magnetic field. It's kind of like those invisible “force fields” that surround an object with invisible power in sci-fi movies and books.

Answer:

Proteins

Explanation:

Proteins are the main building block of the body. They are required for proper growth of the organism.

Answer:

Since photolysis is the splitting of molecules by light, the oxygen that is formed mostly supplies the oxygen in our atmosphere.

Answer:

This question is incomplete as it lacks options. However, it can be answered based on general knowledge of the DNA structure.

Hydrogen bonds in a DNA are located between the nucleotides that holds the double stranded DNA molecules.

Explanation:

Deoxyribonucleic acid (DNA) is the genetic material in living cells. The DNA molecule is made up of nucleotides monomers. However, since the DNA molecule is double-stranded, the nucleotides are of two chains composed of four nucleotide subunits viz: Adenine (A), Thymine (T), Guanine (G) and Cytosine (C).

The two chains of nucleotides in a DNA molecule are called strands. Each strand is bonded to one another by the nucleotides using complementary base pairing i.e. A-T, G-C. The bonds between the nucleotidew of each strand is called HYDROGEN BOND.

Hence, HYDROGEN BONDS in a DNA molecule is located in between two nucleotides of each strand. That is, hydrogen bond holds Adenine to Thymine and Guanine to Cytosine.

Answer:

answer is b

Explanation:

Answer:

Hydrophobic Amino Acids.

Explanation:

The correct description is:

Aristotle’s and Linnaeus’s classification systems both divided all life into two groups: plant and animal: option B.

Aristotle was a Greek philosopher who studied life and living things to be able to explain their behavior.

Linnaeus was a Biologist who studied and classified living things into plants and animals.

Aristotle and Linnaeus both classified living things into plants and animals.

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The class of organic compounds in which the toxins released by the man of war belongs to is referred to as protein.

This is referred to as a biomolecule which is responsible for the growth and the repair of wornout tissues present in the body of organisms. Protein also form part of the bodily fluids such as enzymes, etc.

Papain is referred to as a proteolytic enzyme which is extracted from pawpaw. Since it is an enzyme then we can deduce that it is a protein which is therefore the reason why it was chosen as the most appropriate choice.

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Answer:

A bird is a bird, except when it's a nestling, hatchling, or fledgling. As baby birds grow, the specific names that refer to the change.

Answer:

Mutations can lead to positive adaptations in an organism

Answer:

None of these and the correct answer is thalamus.

Statement b is the one that is not true. Heterochromatin is associated with transcriptional repression rather than being the site of active transcription.

Heterochromatin refers to a tightly condensed form of chromatin, which is the complex of DNA, histones, and other proteins that make up chromosomes. It differs from euchromatin, which is a less condensed and more transcriptionally active form of chromatin.

Let's address each statement regarding heterochromatin:

a. "Heterochromatin remains in a highly condensed state throughout the cell cycle" - This statement is generally true. Heterochromatin is typically more condensed and less transcriptionally active than euchromatin. It maintains its condensed state during most phases of the cell cycle.

b. "Heterochromatin makes up most chromosomal material and is where most transcription occurs" - This statement is not true. Heterochromatin is highly condensed and transcriptionally inactive, meaning that it contains genes that are usually not expressed. Euchromatin, on the other hand, is the region where most transcription occurs as it is less condensed and allows access to the transcriptional machinery.

c. "Heterochromatin exists at the centromeres and telomeres" - This statement is true. Heterochromatin is commonly found at the centromeres, which are the specialized regions of chromosomes involved in chromosome segregation during cell division, and the telomeres, which are the protective caps at the ends of chromosomes.

d. "Heterochromatin occurs inactivated along one entire X chromosome in female mammals in the absence of crossing over and replication" - This statement is true. In female mammals, one of the two X chromosomes is randomly inactivated to achieve dosage compensation. The inactivated X chromosome forms a condensed heterochromatin structure known as a Barr body.

Overall, statement b is the one that is not true. Heterochromatin is associated with transcriptional repression rather than being the site of active transcription.

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Answer:

DNA

Explanation:

Both organelles possess their own DNA and ribosomes.

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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Answer:

tetrahedral is the name of ccl4 molecular shape . may help you(:

Answer:

B

Explanation:

the avelio is apart of ur lungs which makes u breathe

Answer:

ATP provides energy coupling between exergonic and endergonic reactions.

Explanation:

Glucose is broken down apart, then the energy gained is transferred to the energy molecules is correctly described the  step involved in cellular respiration, hence options 1- A, 2- C, 3- A, 4- C, 5- false, 6- D are correct.

The process of cellular respiration involves the oxidation of biological fuels in the presence of an inorganic electron acceptor, such as oxygen, to produce large amounts of adenosine triphosphate, which is an energy containing compound.

The location of the cellular respiration is mitochondria. Cellular respiration occurs in both plant and animal cells.

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It is not specified in the question what the student is referring to when they mention "variation in pelvic spines" and it's also not specified if the student is talking about human or animal, so it's impossible to give a correct option. However, option D) "The variation in pelvic spines resulted from sections of chromosomes exchanging places during meiosis" is a possible explanation for the variation in pelvic spines. During meiosis, the process of cell division that creates sperm and egg cells, chromosomes can exchange pieces of DNA through a process called crossing over. This can lead to variations in the genetic makeup of the cells produced, which could potentially result in variations in physical characteristics such as pelvic spines.

Answer:

A - The fact that the bone structures are similar supports the concept that the animals shared a common ancestor.

Explanation:

Homologous structures refer organs which are similar in structure which are derived from ancestors of similar species.

The benefit of crossing over is that during crossing over there is an exchange of genetic material between the chromosomes.  So option A is correct.

Crossing over produces new gametes with new sets of genes. This helps to increase the genetic variety of any progeny. Crossing over is important because it guarantees genetic diversity and promotes genetic reassortment, which is the primary determinant of genetic diversity among offspring that would otherwise result in a high incidence of abnormalities and genetic disorders.

In the event of unequal crossing over, the event results in the deletion of one of the chromatids involved and the insertion of another, which can result in genetic disease or even developmental failure if a critical gene is lost.

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At the end of aerobic cellular respiration, a total of 6 carbon dioxide (CO2) molecules are produced for each glucose molecule metabolized.

During the process of aerobic cellular respiration, glucose is broken down into pyruvate molecules through glycolysis. Pyruvate then enters the mitochondria and undergoes the citric acid cycle (also known as the Krebs cycle), where it is further broken down to produce energy. During this process, CO2 is released as a byproduct of the reactions.

In the citric acid cycle, each pyruvate molecule is broken down into 3 CO2 molecules. Since each glucose molecule is metabolized into two pyruvate molecules, the total number of CO2 molecules produced is 3 CO2 molecules x 2 pyruvate molecules = 6 CO2 molecules per glucose molecule.

Therefore, the correct answer is 6 carbon dioxide molecules.

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Answer:

a

Explanation:

smallest to largest is, monosaccharide, disaccharide, polysaccharide, took the test

Answer:

a through reproduction of the host cell

Explanation:

T cells are important to our immune system, but they do not release antibodies. They activate B cells and cytotoxic T lymphocytes to kill cells that are infected. Therefore, D is incorrect.

Antibiotics are not produced by our immune system. They can be found in nature or synthesized in labs. Therefore, B is incorrect too.

Lymphocytes are divided into T and B cells. B lymphocytes release antibodies that will recognize pathogens and bind to them, but T cells doesn't work like that. Lymphocyts does not recognize pathogens and C is incorrect as well.

B cells create antibodies, release them and they will bind to pathogens to neutralize them. Therefore, the correct answer is A. B cells release antibodies that neutralize the pathogen.

Answer:

C Because of diffusion of water and chlorine into your skin

Explanation:

Layer M at location 2 is of the same age as layer C at location 1.

This is because the layers at different locations can be correlated based on their relative position and composition. Layers of the same age are typically formed during the same geological event or time period, and can be identified through the use of various dating techniques. In this case, it is likely that layers C and M were formed during the same period of time, as they exhibit similar characteristics such as thickness and composition.

Correlating layers from different locations is an important aspect of geological research, as it helps scientists to understand the history and evolution of the Earth over time. By studying the composition and age of different layers, geologists can gain insight into past geological events such as volcanic eruptions, earthquakes, and changes in climate and sea level. So therefore layer M at location 2 is of the same age as layer C at location 1.

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