What must happen before meiosis can begin ?

What Must Happen Before Meiosis Can Begin ?

Answers

Answer 1
prior to undergoing meiosis, a cell goes through an interphase period in which it grows, replicates its chromosomes, and checks all of its systems to ensure that it is ready to divide. Like mitosis, meiosis also has distinct stages called prophase, metaphase, anaphase, and telophase.

Related Questions

If 23 molecules of glucose are catabolized, how many molecules of ATP are produced (via substrate level phosphorylation) by the TCA cycle? How many FADH2 molecules and NADH molecules are produced by the cycle?​

Answers

Answer:

A

If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1).

B

If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)

C

If Assertion is true statement but Reason is false, then mark (3)

D

If both Assertion and Reason are false statements, then mark (4)

Explanation:Substrate-level phosphorylation is a type of metabolic reaction that results in the formation of Adenosine Triphosphate (ATP) of Guanosine Triphosphat (GTP) by the direct transfer and donation of a phosphoryl (PO3) group to Adenosine Diphosphate (ADP) of Guanosine Diposphate (GDP) from a phosphorylated reactive intermediate.

In glycolysis substrate level phosphorylation occurs in following two reactions

(i) 2molecules of 3-phosphoglyceric acid react with 2 molecules of ADP to from 2 molecules of 3-phosphoglyceric acid and 2 molecules of ATP.

1,3−diphosphoglyceric2 mol eculesacid+2ADP−→−−−−−−−−phosphotransferaseMg2+2−phosphoglyceric2mol eculesacid+2ATP

(ii) 2 mol ecules of phosphoenolpyruvic acid reacts with 2 mol ecules of ADP to from 2 mol ecules of pyruvic acid and 2ATP.

1−phosphoenolpyruvic acid2mol ecules2ADP−→−−−−−−Pyruvic kinaseMg2+Pyruvic acid2mol ecuels+2ATP

we should conserve environment give reason​

Answers

Answer:

for healthy living and long life

to save nature and the animals

What is an ecosystem?

Answers

An ecosystem refers to the combination of a community and its environment
Or
It refers to the interaction of an organism and its environment

What is an office what is an office ​

Answers

Answer:

Explanation:

An office can be referred to a building or rooms or a room which is arranged and set up with furnitures and things needed for commercial use or professional work to achieve a goal.

An office is also refered to position of authority occupied by someone to perform some tasks.

Answer:

here's your answer

Explanation:

The office helps in controlling the activities of different people and department of an organisation. Through controlling it ensures that the various activities of business are performed with much accuracy. Memory Center: Office protects important information of past in a safe manner.

What is the complementary DNA strand for this DNA strand : GTTACGAACT

Answers

Answer:

CAATGCTTGA

Explanation:

oxygen is carried by blood to all the cells of body in the form of ___________​

Answers

Answer:

Oxygen is carried by blood to all the cells of the body in the form of haemoglobin.

Explanation:

Oxygen is carried in the blood in two forms:

(1) dissolved in plasma and red blood cells water (about 2% of the total)

(2) reversibly bound to haemoglobin (about 98% of the total).

Haemoglobin is a protein in the red blood cells and carries oxygen around our bodies. At the same time, carbon dioxide that is dissolved in the blood comes out of the capillaries back into the air sacs, ready to be breathed out.

dialogue between two friends planning a road trip

Answers

What's your question

If you grew up with a family pet, then you have surely noticed that they often seem to hear things that you don’t hear. Now that you’ve read this section, you probably have some insight as to why this may be. How would you explain this to a friend who never had the opportunity to take a class like this?

Answers

Answer:

Force her/him

Explanation:

so that she /he can hear u

Explain why virus could not fit into any one of the five kingdom

Answers

Answer:

To make copies of themselves they necessarily need the intervention of a cell. Therefore, viruses are not living beings. That is why they are not included in any Kingdom in which living beings are included

What is your opinion about climate change ?

Answers

A scientific consensus on climate change exists, as recognized by national academies of science and other authoritative bodies. The opinion gap between scientists and the public in 2009 stands at 84% to 49% that global temperatures are increasing because of human-activity.

Discuss the role of the
kidney in
1. Regulation of blood pressure.
2. Regulation of ECF volume and electrolytes.

Answers

Answer:

blood pressure is regulated by baroreceptors which act via the brain to influence the nervous and the endocrine systems. Blood pressure that is too low is called hypotension, pressure that is consistently too high is called hypertension, and normal pressure is called

What is added to tacos, burritos, and soups that is
high in fiber?

Answers

Answer: flax seed whole wheat tortillas.

1⁄2 cup low-fat refried beans.

1⁄4 cup low-fat cheddar cheese.

leaves lettuce.

1⁄ cup salsa.

1⁄4 cup fat free sour cream.

Pinto beans are added to tacos, burritos, and soups that are high in fiber.

What are fibers and their types?

The body is unable to digest fiber, which is a form of carbohydrate. While fiber cannot be converted into glucose, the sugar that results from the breakdown of most carbs, fiber travels through the body undigested.

The solubility, viscosity, and fermentability of dietary fibers, which have an impact on how they are metabolized by the body, can be used to classify them in general. Dietary fibers have a wide range of chemical compositions.

Fibre comes in two varieties: soluble and insoluble. Both are crucial for good health, digestion, and illness prevention. Thus, Pinto beans are added to tacos, burritos, and soups that are high in fiber.

Learn more about fibers, here:

https://brainly.com/question/13805719

#SPJ6

7. Shawn plotted the data in a bar graph with two bars: one representing the number of bees per colony in the control cages and the other representing the number of bees per colony in the cages exposed to the fungicide. If the results support the hypothesis that fungicides harm bee development, what would you expect this bar graph to show? Describe the expected pattern in a few sentences.

Answers

Answer:

The first bar increases in length as compared to the second bar.

Explanation:

The length of the bar of control cages in graph increases because the number of bees per colony increases while on the other hand, the length of the bar of the cage that is exposed to fungicides decreases because the bees are negatively affected from the application of fungicides. They act abnormal in behaviour and adversely affected the reproduction of bees that greatly affected its population.

The passage suggests that in designing the experiment, Johnson relied on the fact that A) fungal hyphae warn beanstalks of danger if a nearby plant is attacked. B) wasps are harmful to the ongoing existence of broad bean plants. C) broad bean plants release noxious chemicals to ward off infestation. D) aphids are able to withstand the aggressive maneuvers used by wasps.

Answers

the correct answer is AlC

Read each description below regarding the the CNS control of the ANS.

a. It's the integrating centers for reflexes controlling heart rate and blood pressure.
b. It activates the fight-or-flight response.
c. It's the integrating center for thermoregulaton.
d. Sexual thoughts or images can increase blood flow to the genitals.
e. It's the major control center of the ANS.

1. Cerebral Cortex
2. Hypothalamus
3. Brainstem
4. Spinal Cord

Answers

(1)The cerebral cortex, also known as the cerebral mantle, is the outer layer of neural tissue of the cerebrum of the brain in humans and other mammals. The cerebral cortex mostly consists of the six-layered neocortex, with just 10% consisting of allocortex.

(2)The hypothalamus is a small region of the brain. It's located at the base of the brain, near the pituitary gland. While it's very small, the hypothalamus plays a crucial role in many important functions, including: releasing hormones. regulating body temperature.

(3) The brainstem (or brain stem) is the posterior stalk-like part of the brain that connects the cerebrum with the spinal cord. In the human brain the brainstem is composed of the midbrain, the pons, and the medulla oblongata Ten pairs of cranial nerves come from the brainstem.

(4)The spinal cord is a long, fragile tubelike structure that begins at the end of the brain stem and continues down almost to the bottom of the spine. The spinal cord consists of bundles of nerve axons forming pathways that carry incoming and outgoing messages between the brain and the rest of the body.

The protein salmon has an isoelectric point of 12.1. Suppose you did a pH titration of a solution containing salmon. At what pH will the protein aggregate

Answers

Answer:

The correct answer is - 12.1.

Explanation:

In the case of the same isoelectric point of protein and the pH value of the solution, it is the only condition when aggregation of proteins takes place.

When there is intrinsically disordered proteins or misfolded proteins aggregates known as the protein aggregate. So for the first aggregation takes place at pH= 12.1.

explain what it means to view something from a frae of reference. provide an example that illustrate your explanation.

Answers

Answer:

ex. where you are standing now

a perspective that one uses to determine if an object is moving.

Explanation:

in physics, a frame of reference, or reference frame, is a perspective that one uses to determine if an object is moving. ... For example, when you see a ball roll down a street, you can tell the ball is moving because the frame of reference is the streets, whatever may be on the side of the roads, or the Earth.

wikipedia

There are six major groups of enzymes. The categories are based on the types of reactions that they catalyze. What type of enzyme can join together two molecules to make a larger molecule such as a long strand of DNA

Answers

Answer:

DNA ligase.

Explanation:

DNA ligase is a type of enzyme that is responsible for join together of two molecules to make a larger molecule such as a long strand of DNA. This enzyme joins the end of two DNA molecules making it a long strand of DNA. In DNA cloning process, restriction enzymes and DNA ligase enzymes are used to incorporate genes and other pieces of DNA into plasmids so we can say that DNA ligase is responsible for long strand of DNA.

In pea plants, flowers are either white or purple: the purple color is produced by pigments called anthocyanins. The production of anthocyanins is a two-step process: the first step is controlled by the C gene and the second by the P gene. Both genes must produce functional proteins for anthocyanin to be produced. This is an example of:

Answers

Answer:

This is an example of gene translation.

Explanation:

Gene translation refers to the genetic process where a set of genes is used to create amino acids that will be responsible for creating a protein needed to perform some function or characteristic of the organism. In the question above, we can see that anthocyanin, responsible for the pigment of flowers, is created through the work of proteins that are created from gebes C and P. This is an example of gene translation, as it presents the formation of proteins regulated by genes.

The energy source for active transport is ________ , while the force driving facilitated diffusion is ________.

Answers

Answer:

JJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJJ

Explanation:

How do you explain Meiosis?

Answers

Answer:

Chromosome pairs with its corresponding homologous chromosome to form a tetrad.

is it possible that after the first meeting of male and female through sexual inter course
the female become pregnant after the sex??​

Answers

Answer:

Yes, it is possible because, if the sperm from the male goes into the egg of the female it can cause the female to get pregnant by that male. And its very rare for the female not to get pregnant after having inter course with the male. That's only if they had unprotected sex.

I hope this helps you!

XoXo Mashayla

Explanation:

Dark skin ( a result of increased melanin production in equatorial populations), is likely a response to ultraviolet radiation because UV radiation causes:

Answers

Answer: Skin cancer

Explanation:

Melanin is a pigment derived from an amino called acid tyrosine. The most common form of melanin is called eumelanin, which is a polymer of dihydroxyindole carboxylic acids and their reduced forms. When a person is exposed to the ultraviolet light (UV) from the sun, the melanocytes will produce eumelanin to prevent the skin from burning and damage to the cell nuclei (where DNA is found) of the epidermis. This melanin production causes the skin to darken. The eumelanin in the skin then acts as a natural sunscreen by blocking the damaging effects of sunlight. So, skin darkens when exposed UV light, thus providing greater protection when needed by producing more eumelanin, but it also becomes more likely to develop melanoma, which is a type of skin cancer. This is because UV rays damage the DNA of skin cells. The DNA (deoxyribonucleic acid) is the genetic material that has the instructios to the growth and functioning of an organisms). Skin cancers begin when eumelanin protection is not sufficient and this damage affects the DNA of the genes that control the growth of skin cells. This results in a tumor, which is the uncontrolled growth of cells (in this case, skin cells) because there will be a mutation in DNA that affects the function of the cells.

Cystic fibrosis is most common in individuals of Northern European descent, affecting 1 in 3200 newborns. Assuming that these alleles are at Hardy-Weinberg equilibrium, what is the frequency of the disease-causing CFTR alleles in this population

Answers

Answer:

0.0177

Explanation:

Cystic fibrosis is an autosomal recessive disease, thereby an individual must have both copies of the CFTR mutant alleles to have this disease. The Hardy-Weinberg equilibrium states that p² + 2pq + q² = 1, where p² represents the frequency of the homo-zygous dominant genotype (normal phenotype), q² represents the frequency of the homo-zygous recessive genotype (cystic fibrosis phenotype), and 2pq represents the frequency of the heterozygous genotype (individuals that carry one copy of the CFTR mutant allele). Moreover, under Hardy-Weinberg equilibrium, the sum of the dominant 'p' allele frequency and the recessive 'q' allele frequency is equal to 1. In this case, we can observe that the frequency of the homo-zygous recessive condition for cystic fibrosis (q²) is 1/3200. In consequence, the frequency of the recessive allele for cystic fibrosis can be calculated as follows:

1/3200 = q² (have two CFTR mutant alleles) >>  

q = √ (1/3200) = 1/56.57 >>

- Frequency of the CFTR allele q = 1/56.57 = 0.0177  

- Frequency of the dominant 'normal' allele p = 1 - q = 1 - 0.0177 = 0.9823

14.
(GT.03)
Which of these best matches a source of information with its most reliable use? (2 points)


cladogram → date events which occurred in Earth's past

cladogram → study the evolution of organisms based on adaptations

fossil records → compare the evolution of completely soft-bodied organisms

fossil records → study the behavior of primitive animals in extreme weather conditions

Answers

Answer:

petrified fossils → date sedimentary rocks

i.Name two heart diseases in humans.


ii.State three causes of heart diseases.​

Answers

Answer:

Arrhythmia

Atherosclerosis

Common causes of heart diseases

Diabetes.

Drug abuse.

Excessive use of alcohol or caffeine.

High blood pressure.

Comparing Densities
If two balls have the same volume, but ball A has twice as much mass as ball B, which one will have the greater
density?
If ball C is 3 times the volume of ball D and ball D has 1/3 the mass of ball C, which has the greater density?
If two balls have the same mass, but ball P is twice as large as ball Q, which one will have the greater density?
If ball X is twice as big as ball Y and weighs only half as much as ball Y, then which one will have the greater
density?
mious Activity

Answers

Answer:

Ball A has more density.  

Explanation:

Density is found using mass divided by volume. Let's say ball A has a mass of 6 grams, and ball B has a mass of 3 grams. If the volume for both is 1 mL, then ball A has more density.

Recall that one approach to the study of cell cycle regulation has been to fuse cultured cells that are at different stages of the cell cycle and observe the effect of the fusion on the nuclei of the fused cells (heterokaryons). When cells in Gl are fused with cells in S, the nuclei from the Gl cells begin DNA replication earlier than they would have if they had not been fused. In fusions of cells in G2 and S, however, nuclei continue their previous activities, apparently uninfluenced by the fusion. Fusions between mitotic cells and interphase cells always lead to chromatin condensation in the nonmitotic nuclei. Based on these results, identify each of the following statements about cell cycle regulation as probably true (T), probably false (F), or not possible to conclude from the data (NP). Sort each statement into the appropriate bin.
1. The transition from mitosis to G1 appears to result from the disappearance or inactivation of a cytoplasmic factor present during M-phase.
2. The activation of DNA synthesis may result from the stimulatory of one or more cytoplasmic factors.
3. Gl is not an obligatory phase of all cell cycles
4. The transition from G2 to mitosis may result from the presence in the G2 cytoplasm of one or more factors that induce chromatin formation.
5. The transition from S to G2 may result from the presence of a cytoplasmic factor that inhibits DNA synthesis.
A. T
B. F
C. NP

Answers

Answer:

1. T

2. T

3. NP

4. F

5. F

Explanation:

In somatic cells, the cell cycle can be divided into 1-the interphase, 2-the mitotic phase or M phase, and 3-the G₀ phase. In turn, the interphase of the cell cycle can be divided into three phases: 1-the gap 1 (G1) phase or growth 1 phase, 2-the S phase (DNA replication or DNA synthesis), and 3-the gap 2 (G2) phase or growth 2 phase. During the G1 phase, the cell synthesizes key enzymes which are required during DNA replication (S phase) and cell division (M phase). Cytoplasmic factors are proteins and messenger RNAs (mRNAs) that control cell functions during the cell cycle. This cycle is modulated by proteins known as control factors, i.e., cyclins and cyclin-dependent kinases (Cdks) that work together to control the progression through different phases of the cell cycle. The transition from S to G2 occurs after DNA replication. This transition (S to G2) is controlled by a DNA damage checkpoint orchestrated by the ATM (Ataxia telangiectasia mutated) and ATR (Ataxia Telangiectasia and Rad3 related) kinases which are recruited to DNA damage sites. Moreover, the ​transition from G2 to M phase is mediated by the accumulation of mitotic inducers, which lead to an increase in the activity of mitotic kinase and finally trigger mitotic entry.

Chordates have a chord in the back for support. In animals with vertebrates, the
chord itself becomes the

Answers

Answer:

1

Explanation:

What is rcbL, and why is it a particularly useful molecule for studying evolutionary relationships in plants and green algae

Answers

Answer:

RBCL denotes for 'rubisco protein.' It is characterized as 'a plant enzyme which catalyzes both the fixing of carbon dioxide found in atmosphere during photosynthesis and the reverse process of photorespiration.' It plays a very significant role in studying, as well as, in evaluating relations associated with phylogenetics in plants primarily along with green algae as it assists them to produce energy molecules by using carbon dioxide from the atmosphere. It has therefore been the key factor behind a number of organic carbon that is discovered in our surrounding biosphere.

Other Questions
b Nobody can deny that now we have better medical facilities in the city. ( affirmative )c Where else will you get such an attractive package? ( assertive )d Everybody wants to lead a peaceful life. ( interrogative ) Select the item that is not a form of nonfiction.Compare/contrastChronologicalPetrarchanProblem/solution When the spacecraft is at the halfway point, how does the strength of the gravitional force on the spaceprobe by Earth compre with the strength An urn contains 2 small pink balls, 7 small purple balls, and 6 small white balls.Three balls are selected, one after the other, without replacement.Find the probability that all three balls are purpleExpress your answer as a decimal, rounded to the nearest hundredth. Which statement about inheritance is true?Girls get most of their traits from their moms; boys get most of their traits from their dads.Male offspring will always have an X-linked genetic disease if the mom is a carrier.Fathers always determine the gender of the offspring in humans.Males never have Y chromosomes. Based on the information in the table, whatis the acceleration of this object?t(s) v(m/s)0.09.01.04.02.0-1.03.0-6.0A. -5.0 m/s2B. -2.0 m/s2C. 4.0 m/s2D. 0.0 m/s2 Murphy's, Inc., has 45,000 shares of stock outstanding with a par value of $1 per share. The market value is $10 per share. The balance sheet shows $70,500 in the capital in excess of par account, $45,000 in the common stock account, and $133,500 in the retained earnings account. The firm just announced a stock dividend of 12 percent. What will the balance in the capital in excess of par account be after the dividend? a ball is thrown straight up into the air while the ball is traveleling upwards what are the magnitue and direction 2. Describe social diversity and discuss two examples. What is the standard form equation of the quadratic function shown in this graph? You are certain to get a heart, diamond, club, or spade when selecting cards from a shuffled deck. Express the indicated degree of likelihood as a probability value between 0 and 1 inclusive. which of the following is false? when a cboe call option on ibm is exercised, ibm issues more stock. an american option can be exercised at any time during its life. a put option will always be exercised at maturity if the strike price is greater than the underlying asset price les regalo estos puntos what happens to the conflict in a story during rising action What was the purpose of the SALT I treaty with the USSR?A. to improve trade relationsB. to secure military support from the USSRC. to limit the manufacturing of missilesD. to pledge military support to the USSR Why were the city-states in Mesopotamia constantly warring with each other? How did Sargon finally bring together a unified state? Why is the adoption of the customs of a conquered people a good strategy for a conquering ruler? Which of the following terms describes an attacker walking or driving through business areas and neighborhoods to identify unprotected wireless networks from the street using a laptop or a handheld computer?A. Wi-Fi stealing.B. Wi-Fi trolling.C. Wi-Fi jacking.D. Wi-Fi hacking. The velocity of a car over five hours is given by v(t) = 60 ln(t + 1), 0 < t < 5in kilometers per hour. What is the total distance traveled from t = 0 to t = 5?Round your answer to the nearest whole number and do not include units. In order to maintain good sleep hygiene, it is best to reserve your bed for sleeping and to engage in all other activities in other parts of your house. Animism and egocentrism represent limitations in the preoperational child's thinking in that they indicate an inability to: