BIOLOGY HIGH SCHOOL

What happens during G1 phase?
a

Answers

Answer 1
Answer:

Answer:

Growth and Development.

Explanation:

.

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What stage in meiosis does crossing over occur?

Answers

crossing over occurs during the prophase I of meiosis, where homologous chromosomes pair up and exchange segments, contributing to genetic diversity in offspring.

The stage in meiosis where crossing over occurs is the prophase I. During this phase, the proteins associated with homologous chromosomes bring the pair close to each other, a process called synapsis.

The genes on the chromatids of the homologous chromosomes precisely align with each other, initiating an exchange of chromosome segments between non-sister homologous chromatids.

This exchange is known as crossing over, contributing greatly to genetic variation among organisms.

Following this process, the homologous chromosomes separate and distinct combinations of maternal and paternal chromosomes make their way into the gametes.

Learn more about crossing over here:

brainly.com/question/34370061

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it occurs during the prophase stage

Which plant cell structure stores large amounts of chemicals including salts, minerals, proteins, and water for the cell and helps the cell maintain its shape? plastids chloroplasts central vacuole cell wall

Answers

The correct answer to the question above is central vacuole. Central vacuole is the plant cell structure that stores large amounts of chemicals which includes salts, minerals, proteins, and water for the plant cell, and helps the cell to maintain its shape.

Answer:

Which plant cell structure stores large amounts of chemicals—including salts, minerals, proteins, and water—for the cell and helps the cell maintain its shape?  central vacuole

Plants have a ____ which prevents bursting in a hypotonic environment

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The answer is cell wall. It is the rigid outer layerof plant cells that is composed of subunits of cellulose molecules,pectin,  lignin, or hemicellulose. It enablesthe plant to withstand turgor pressure,without bursting, required to give them support.

What are meristematic tissues?

Answers

Meristematic tissue is the dividing tissue present at the growing regions of the plants. They are meant for growth of an organ Cells of meristems divide continuously and help in increasing the length and girth of the plant
The cells of this tissue are similar in structure and have thin cellulose cell walls
The cells do not contain any intercellular space between them 
The cells contain few vacuoles or no vacuoles at all
They are further divided in the following parts
1)Apical meristem
2)Lateral meristem
3)Intercalary meristem
Meristematic tissues are the temporary tissues. They help in the growth of plants and after contributing to the growth of plants, they get transformed to permanant tissues.

A pea plant that has round seeds has the genotype Rr. It is crossed with a pea plant that has wrinkled seeds and the genotype rr. What is the possibility that the offspring will have wrinkled seeds

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The correct answer is 50%, or 1/2. We know that round seeds are dominant, since the round pea plant has a genotype of Rr and the wrinkled pea plant has a genotype of rr. If it helps, draw a Punnett square with the two genotypes.

   R  r
r
r

The square works exactly like a coordinate grid. Combine the letters above and beside whichever of the four spaces you chose to find the genotype for that space.

   R  r
r Rr  rr
r Rr  rr

Therefore, 2 out of 4 of the pea plants have round seeds, since a genotype of Rr means that a plant will have round seeds, and 2 out of 4 will have wrinkled seeds, since a genotype of rr means that a plant will have wrinkled seeds. 2/4 simplifies to 1/2, or 50%. Therefore, there is a 50% chance that the offspring will have wrinkled seeds.

Hope this helps!

In what way should scientists contribute to the discussion on global warming and climate change?a. The role of scientists is to present research that clearly represents their personal beliefs regarding the issue.


b.Scientists should not get involved in decisions that affect modern society.


c. Scientists cannot provide accurate information on environmental issues such as global warming.

d. Scientists provide sound scientific data to help society make informed decisions.

Answers

The correct answer is (b.) Scientists should not get involved in the decision that affects modern society. The scientist may give the scientific factual information they have, however, in terms of the decision, it may be best to leave it to the authorities. 
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