In which phase of meiosis would certain gene segments of the homologous pairs of chromosomes "cross over" and exchange genetic information?
A) prophase I B) anaphase I C) metaphase I D)anaphase II

Answers

Answer 1
A) prophase I

Hope this helps!!!
Answer 2
A. prophase I is the correct answer

Related Questions

Are transactions for which there are, at present, no contracts or agreements between parties.
a.backlog exposure
b.quotation exposure
c.anticipated exposure
d.none of the above

Answers

its B quotation exposure (;

The large opening at the base of the skull through which the spinal cord passes is an important clue to evolutionary relationships. it is called the

Answers

Answer:It is called The Foramen Magnum

Explanation: It is a large oval opening linking the Spinal cord and the Brain

Hope this helps : )

commercial jets fly in the lower stratosphere. what happens to thhe exterior temperature of these planes as they leave the stratosphere and return to the ground

Answers

Final answer:

As a jet transitions from the stratosphere back to the troposphere and ultimately to the ground, the exterior temperature of the plane increases due to higher air density and increased heat absorption in the lower atmosphere levels.

Explanation:

When a commercial jet transitions from the lower stratosphere back to the troposphere, the exterior temperature of the plane increases. In the troposphere, where most of our weather occurs, temperatures rise as it approaches the Earth's surface. This is due to the higher density of air and its ability to absorb and retain heat. The stratosphere above is generally colder and lacks the defining weather characteristics we see near ground level.

As the plane descends from the stratosphere to the troposphere, the increase in temperature is notably due to the fact that the stratosphere's temperature increases with altitude because of the ozone layer's absorption of the Sun's ultraviolet radiation. However, the overall trend still shows a significant decrease in temperature as we climb from the Earth's surface to the upper levels of the stratosphere, thus when the plane returns to ground, it experiences an increase in the exterior temperature.

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It is possible for a cell to make proteins that last for months; hemoglobin in red blood cells is an example. however, many proteins may be degraded in days or even hours. what is the advantage of short-lived proteins?

Answers

Enable the cells to adjust or control gene expression when this is critical to their well being.

What increases glycogen breakdown in the liver and raises your blood sugar?

Answers

The answer is Glucagon Increases. This works like this after a meal of a rich carbohydrate, over four to six hours the blood glucose level rise, leading to an increase in glycogen. Produced by alpha cells of the pancreas and released in response to low blood glucose and epinephrine. Secretion inhibited by high blood glucose and insulin. Stimulates glycogen breakdown and inhibits glycogen synthesis

One species of fish feeds in the muddy bottom of a lake. a second species eats insects that land on the water surface. this is an example of

Answers

This is an example of ecological isolation.
When two species that have similar ecological niches (places in physical space and the food web in the ecosystem) exist in the same ecosystem, they tend to specialize for a specific area of the type of resource they use, isolating themselves from the other species.

Final answer:

The example given is a demonstration of ecological niches and resource partitioning, where two fish species have different feeding habits that reduce competition for food resources, an instance of disruptive selection and assortative mating contributing to species divergence.

Explanation:

The scenario presented where one species of fish feeds in the muddy bottom of a lake, while a second species eats insects landing on the water surface, illustrates the concept of ecological niches and resource partitioning. In the context of ecology and evolutionary biology, these behaviors reflect how species utilize different parts of their environment to avoid direct competition for resources – a phenomenon known as disruptive selection. This form of ecological divergence often leads to species developing specialized feeding habits and adaptations.

Disruptive selection and assortative mating are important mechanisms contributing to the formation of new species within ecosystems. As species evolve to exploit different resources, they may also exhibit preferences in mating with individuals that have similar resource usage patterns, further contributing to the divergence of species. The example of the three-spined stickleback fish described by Dr. Luke Harmon's research highlights how variations in feeding habits could lead to evolutionary changes that impact the ecosystem environment.

Which biome is characterized by conifers, or trees whose seeds grow in cones?

Answers

Taiga is the biome characterized by conifers. 
Tagia i think it is.

A mutation that causes production of a defective pilus in a bacterium will prevent __________. view available hint(s) a mutation that causes production of a defective pilus in a bacterium will prevent __________. translation conjugation transduction transformation

Answers

I believe that a mutation which causes production of a defective pilus in a bacterium will prevent conjugation. Mutations are spontaneous random changes that occur in the genetic make up of an organism. Conjugation is the transfer of genetic material between bacterial cells by direct cell to cell contact or by a connection between two cells using special structures called pilus. Thus a mutation that produces a defective pilus will impair the process of conjugation. 

You are a doctor working in sierra leone. a patient presents with fever, vomiting, bleeding and a brain infection. which would be best to diagnose?

Answers

I would diagnose the patient with lassa fever. Lassa fever is an acute viral illness which lasts for 4 weeks. It occurs mostly in west Africa and Sierra leone is found in west Africa. Some of it's symptoms are fever, nausea or vomiting, headache and diarrhea. In severe cases bleeding will occur.

In order to better understand similarities and differences among biological organisms, scientists developed a system of classification. initially, the system only consisted of two kingdoms - animalia and vegetabilia. now, there are six kingdoms - eubacteria, archaebacteria, protista, fungi, plantae, and animalia. this demonstrates that

Answers

This illustrates that the science of taxonomy is continually evolving and improving as more knowledge is derived and scientists understand evolution better. The discovery of more and more fossil evidence showing the branching of major taxonomic units has improved this knowledge. Further modern technology, such as genetic and molecular techniques, have allowed scientists to study the relatedness of existing species.

sytems of classification are adaptable

Spores grow into a gametophyte with both _______________organs.

Answers

Spores grow into a gametophyte with both male and female organs. Because of this adaptation spores are able to clone themselves. This is also known as asexual reproduction. Asexual reproduction is an advantage to plants and spores because they do not have to rely on another plant to produce the other gamete needed to reproduce. This allows them to reproduce quickly and in large numbers.

If the frequency of p^2 equals 0.49, what is the value of q?

A. 0.3

B. 0.009

C. 1

D. 0.7

Answers

The answer would be A 0.3

A prokaryote that obtains energy from light is a(n) _____.

Answers

A prokaryote that obtains energy from light is a(n) phototroph.

A prokaryote that obtains energy from light is a Phototroph.

Phototropic bacteria or archaea are a group of prokaryotes which use the source of energy as light. These prokaryotes convert the light energy to chemical energy in the form of chemical bonds and have several photochemical mechanisms in their metabolic pathways. Depending on the metabolic pathway the bacteria follow, the phototropic prokaryotes use carbon sources and are autotrophs undergoing the process of photosynthesis.

The cyanobacteria are the most commonly known prokaryotes which are phototropic in nature.

As an embryo develops, new cells are produced as the result of

Answers

The result of cell division.

As an embryo develops ; new cells are produced as a result of mitosis cell division. A series of cell division occurs called cleavage. During cleavage number of cells increases without increasing the size of the cell. An embryo divides into a number of smaller cells called blastomeres. An embryo with blastomeres is called balstula.

examples of advantageous genes that can be transferred by transduction are genes for:

Answers

Gene transfer via transduction could be beneficial if the donor has a new gene that could produce a useful protein. This protein could be an enzyme with various effect like
1 digesting food(fermentation),
2 digesting drug(drug resistance) or
3 toxin that could kill the nearby cells(to decrease food competition).

List three signs that could make you think a chemical reaction might be taking place

Answers

change in color, change in temperature , production of light, production of gas , Formation of a precipitate, any of those will work
Hi there!!!

3 signs that indicate a chemical reaction is taking place are:

1.  Temperature change
2. Color change (rusting)
3. Release of gas bubbles
Others would be the formation of precipitate, the release of energy, or change in odor.

Hope this helped u!!

~TRUE BOSS


Which of the following describes an interaction between the musculoskeletal system and the respiratory system?

The air sacs absorb more oxygen during vigorous exercise.
The air sacs are used due to signals from the brain.
The blood delivers glucose and oxygen to cells.
The blood carries waste materials to the kidneys.
PLEASE ANSWER QUICK

Answers

A. The human body is obviously well equipped to extract oxygen from inhaled air and deliver that oxygen to all cells in the body, including muscles. ... At the same time, carbon dioxide that was produced by muscles and other cells leaves the blood, passing across the lung membranes to be exhaled from the body

Answer:

The air sacs absorb more oxygen during vigorous exercise.

Explanation:

Function of respiratory system is to carry out gaseous exchange to makes the blood rich in oxygen. Musculoskeletal system is involved in movement of body and needs oxygenated blood to drive the muscle contraction and body movements. Musculoskeletal system needs increased oxygen supply during vigorous physical activity to support the movement which in turn is fulfilled by increased absorption of oxygen by air sacs.

What three kingdoms hold the most common pathogens?

Answers

We have that all of life is organized in 5 kingdoms. The animals and the plants are pretty straightforward; the first one contains most organisms that produce their own energy and the second one contains multicellular organisms that usually move. Fungi are a kingdom whose members are both multicellular and monocellular and they are eukaryotic. Protista are eukaryotic unicellular and Monera are prokaryotic unicellular. Most of the pathogens that we treat today are either fungi (athlete's foot) or are caused by bacteria which are contained in the kingdom of monera. A lot of protista can also be pathogens; a prime example is the disease of malaria whose cause is a protist. Viruses are also a big threat to health and are called pathogens but they do not constitute a kingdom (we do not classify them as alive). Hence, the three correct choices are Protista, Monera and Fungi.

In a brain surgery that went wrong, matthew lost a portion of his _____ cortex and has blindness in part of his field of vision. this condition is known as blindsight.

Answers

In a brain surgery that went wrong, Matthew lost a portion of his Visual cortex and has blindness in part of his field of vision. This condition is known as blindsight.

In humans, a cleft chin is dominant and no-cleft is recessive. What will the generations look like? Assume that Mendel’s method of crossing two true breeding parents with opposite traits is followed. Check all that apply.

The P generation, F1 generation, and F2 generation will have all cleft chins.

The P generation, F1 generation, and F2 generation will have all no-cleft chins.

The P generation and F1 generation will have all cleft chins.

The F1 generation will have all cleft chins.

The P generation and F2 generation will have all no-cleft chins.

The P generation and F2 generation will have cleft chins and no-cleft chins.

The P generation, F1 generation, and F2 generation will have cleft chins and no-cleft chins.

Answers

The answers would be:

The F1 generation will have all cleft chins.

The P generation and F2 generation will have cleft chins and no-cleft chins.

If you'd like to know why:

Using Mendel's method of crossing:

Let C be the dominant trait and c be the recessive trait.

We do first the P generation. True breeding would been that both are homozygous, one is dominant and the other recessive.

CC x cc (This means in the P generation, we have both no cleft chins and cleft chins)

The Punnet for that would look like this:

      c         c

C  Cc       Cc

C  Cc       Cc

F1 generation would then all have cleft chins. If the genotype of the same trait consists of at least 1 dominant allele, then the dominant trait will be expressed. In this case, cleft chin.

Now we do the breading of F1 generation. So since they are all Cc, then the cross would be between two Cc.

Cc x Cc (F1 Generation)

The Punnet for that would look like this.

     C       c

C  CC    Cc

c   Cc     cc

As you can see we have a homozygous recessive in the mix now and the others are all dominant. So we can say that the F2 generation is a mix of cleft- and no cleft chin.

The generations will look like the following:

The F1 generation will have all cleft chinsThe P generation and F2 generation will have cleft chins and no-cleft chins.

According to this question, a gene coding for presence of cleft is involved. The allele for cleft chin (C) is dominant and no-cleft (c) is recessive.

If two true breeding parents are crossed i.e. CC (cleft chin) × cc (no cleft chin) (see attached image). The F1 generation consists of offsprings with Cc genotype.

If Cc × Cc are crossed to get the F2 generation, the following offsprings are produced: CC, Cc, Cc and cc.

CC will have a cleft chinCC will have a cleft chincc has no cleft

Therefore; the generations will look like the following:

The F1 generation (Cc) will have all cleft chinsThe P generation and F2 generation will have cleft chins and no-cleft chins.

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____________ are the ultimate beneficiaries of a free and active media.

Answers

The people are the ultimate beneficiaries of a free and active media. Media is meant to inform the people of what is going on in the world in form of politics, business, sports and even fashion. This information reaches the people through the radio, television and print media.

which is not a characteristic common to all minerals metallic luster orderly crystalline structure solid substance

Answers

Metallic luster is not a characteristic common to al minerals

metallic luster is your answer

Professor murphy is studying neurons that release a particular small-molecule neurotransmitter. in these many of these neurons, the professor should expect to see​ ​no other types of neurotransmitters. ​at least one type of neuropeptide neurotransmitter. ​at least one other type of small-molecule neurotransmitter and multiple types of neuropeptides neurotransmitters. ​a second type of small-molecule neurotransmitter.

Answers

I believe the answer is at least one type of neuropeptide neurotransmitter.  Neurotransmitters are the chemicals which allow the transmission of signals from one neuron to the next across synapses. They are also found at the axon endings of motor neurons, where they stimulate the muscle fibers. Neuropeptides are one type of neurotransmitters and they are composed  only of peptides with larger molecular weights, a key difference between neurotransmitters and neuropeptides.

A race car driver loses his leg in an accident. Apply Lamarck's and Darwin's theories of evolution to predict whether this disability will be carried forward by his children.

Answers

Answer: A disability like this isn’t considered a genetic conditioning, so passing it on to his children isn’t possible.

Answer:

According to Lamarck's theory the mutation in the somatic cells would also be carried from the parents to the children.

But, Darwin's theory states that the somatic mutations are not carried to another generation. Only germ line mutations are carried from one generation to another.

Since, losing a leg during leg injury is not related to germ line so it would not be carried from parent to children.

This statement is true according to Darwin but false according to Lamarck's theory.

If a nurse takes a blood sample immediately before and after a healthy persons performs exercise, which of the following is the most likely finding?

Answers

I think the one on the bottom.
The answer you are likely looking for is A. You don't breathe heavily before you begin to exercise, and you do later because the body is trying to bring in needed oxygen for the exercise.

So A is your best answer.

identify which hormones are at work in each of the following events;
• a tomato ripening and turning red
• a plant stem increasing in height
• increased cell division seen under the microscope
• seed germination in a dandelion plant

Answers

the first one 
hope this helps

1.ethylene

2.auxins or gibberellins

3.cytokinins

4.gibberellins

A client with congestive heart failure is admitted to the hospital after reporting shortness of breath. how should the nurse position the client in order to decrease preload?

Answers

I think the nurse should position the client, with the Head of the bed elevated at 45 degrees and lower arms supported by pillows in order to reduce preload. Cognitive heart failure symptoms is a heart condition that causes symptoms of shortness of breath, weakness, fatigue, and swelling of legs, ankles, and feet. 

Mrs. smith presented to her physician's office for an office visit for an upper respiratory infection. the physician examines the patient and prescribes antibiotics. the physician notices the patient has a suspicious looking mole. the physician examined the mole and determined that it should be removed. the mole was removed during the same office visit. the physician bills both an e/m code and a procedure code. which modifier would you use on the e/m code

Answers

Correct answer: Modifier 25

Modifier 25 is used to report an evaluation and management service that is significantly unrelated to the surgical procedure performed by the same physician on the same day and the minor procedure was not planned but rather happen as a spontaneous decision made at the time of the physical examination.

What determines the nucleotide sequence of the newly synthesized strand during dna replication?

Answers

your answer to this question is nucleotide sequence of the template strand I hope this helps if you need any more questions add me as a friend and I'll try to help as much as I can

During replication, the nucleotide sequence of the newly synthesised DNA strand is determined by the template strand of the parent DNA. From the 5' end to the 3' end, DNA is synthesized.

What is DNA replication?

DNA replication is a process in which a copy of the DNA is synthesised from the parent DNA. In the DNA synthesis, both strands are separated by the helicase enzyme.

This enzyme unwinds the double strand of DNA and converts it into a single strand. The single strand is taken as a template by the DNA polymerase. The DNA polymerase synthesises the new DNA by adding the nucleotide from 5' to 3'.

The 3' OH of the existing nucleotide is attached to the 5' phosphate of the upcoming nucleotide by making a phosphodiester bond. Adenine pairs with thymine, and guanine makes a pair with the cytosine base during DNA  replication. These are nitrogenous bases.

Hence, the existing nucleotide bases of parent DNA strands make new strands complementary.

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Proteins are made from what subunits?

Answers

Protein is made up of subunits and each subunit is made up of polypeptides molecules . Called Amino acids .
Final answer:

Proteins are created from subunits called amino acids, which join together through peptide bonds. The structure and function of a protein is determined by the unique combination and interactions of these amino acids. Hemoglobin is a notable example of protein structure.

Explanation:

Proteins are important components for all body tissues, and they are made from subunits called amino acids. These amino acids are nitrogen-containing monomers that join together by peptide bonds. The structure and function of proteins largely depends on their shape, which in turn is determined by the interactions between these amino acids and their subsequent folding into various secondary, tertiary, and quaternary structures.

There are 20 different types of amino acids that contribute to the thousands of different proteins in the human body. Each protein contains a unique combination of these amino acids.

An example to demonstrate this concept is hemoglobin, a protein that has a quaternary structure made up of four globular protein subunits: two alpha and two beta polypeptides.

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