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Leokris [45]
3 years ago
14

During a cell's development, it differentiates. How does differentiation occur?

Biology
1 answer:
DENIUS [597]3 years ago
6 0
D. Certain genes are turned on and others are turned off; this action produces adult cells that are specialized
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Problems With Overgrazing
Anastaziya [24]
The weak, overgrazed pasture will be particularly vulnerable to interrill, rill, and gully erosion, which can result in the loss of important topsoil, a decrease in soil organic matter, and a drop in the nitrogen pool available to feed your fodder. Compaction of the soil is exacerbated by excessive grazing.
4 0
2 years ago
What is a charge that improves a species' change of survival?
Sloan [31]
First of all, it is a change, not a charge.
Phenotype is physical manifestation of gene(physical), not a change, so it is not phenotype.

Variation is a state of being genetically diverse, but it is not a change, therefore it is not variation.

Genetics is the name of a field, and it is not a change.

Adaption are changes of a population overtime, through natural selection.

It is adaptions
4 0
2 years ago
Punnett squares use mathematical probability to help predict the genotype and phenotype combinations in genetic crosses. Select
Lina20 [59]

Question:

I failed to find the options, but I will post the way by which you can construct Punnett squares.

Answer and Explanation:

First, you need to know both parental individuals´ genotypes. From these genotypes, you will get all the possible gametes for each parent, following the principle of simple segregation.

Then, by using a simple square, you will make the crosses. This is:

  • You will locate all the possible gametes of one parent on the top of the square
  • You will place all the possible gametes of the other parent on the left edge of the square.
  • Once you have done that, you will perform the crosses. You will look for the intersection between each parent´s gametes and place all the involved alleles in the intersection-box. These are the possible genotypes, and they will be written within the square.

In the attached files, you will find an example of the cross between two pure-breeding plants.

Download pdf
3 0
3 years ago
Pls help i dont get it question is above ​
Neporo4naja [7]

Answer:

A. Cell wall and chloroplast

B. Nucleus (the dark grey circle)

Explanation:

4 0
2 years ago
How is atmospheric nitrogen converted into a biologically useful form of nitrogen?
frutty [35]

Answer:

The atmosphere is the largest reservoir of the nitrogen as it is composed of 78% of Nitrogen. Although 78%, this is not used by the organisms directly as the nitrogen molecule exists in nature in the form of divalent joined via triple bonds.

These triple bonds require a great amount of energy to be broken and used. Only a few prokaryotic organisms called nitrogen-fixing bacteria have the capability to break these triple bonds as they contain enzymes-nitrogenase complex which converts the atmospheric nitrogen to usable forms like ammonia, nitrates and nitrites. About 92% of the atmospheric nitrogen is fixed through this way rest through thunderstorms and Haber's process.

Thus, nitrogen-fixing bacteria is the answer.

8 0
3 years ago
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