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olasank [31]
3 years ago
9

The top layer of soil in the tundra that thaws in the summer is called the _____.

Biology
2 answers:
stiks02 [169]3 years ago
5 0
Is called the
active layer
Delvig [45]3 years ago
5 0

Answer:active zone is correct on gradpoint

Explanation:

You might be interested in
The combination of mitotic cyclin with CDK signals the __________.
Masteriza [31]

Answer:

The correct answer is beginning of cell mitosis.

Explanation:

Cyclins are cell cycle regulatory protein which regulates the catalytic activity of cyclin dependent protein kinase or CDK.From the name cyclin dependent protein kinase it can be concluded that CDK helps in the phosphorylation of key proteins of cell cycle.

  The combination of cyclin with CDK helps in the progression of cell from one phase to another.

  Such as cyclin A CDK 2 helps also called G1 cyclin CDK helps in progression of cell from G1 to S phase whereas Cyclin B CDK 1 or M cyclin CDK helps in beginning of mitosis phase or M phase of the regulated cell.

8 0
3 years ago
Hopefully this is it but whats the andwer to this-
kompoz [17]

Answer:

the answer to this question is B i believe

7 0
3 years ago
Read 2 more answers
You are examining the phylogenic relationship of a newly discovered plant species (Species 2). You amplify the RUBISCO barcode a
frozen [14]

Answer:

a. Inversion

b. Duplication

Explanation:

Inversion has the name suggest, has to do with a segment of DNA being reversed from end to end.

In this case here,

Inversion is taking place here.

species 1 ATGCAAATTTGGGCCCATGAATGGTTGCAA

species 2 ATGCAAAAATTTTGGTACGCCGAATGGTTGCAA

Therefore, the sequences in bold in species 1 are observed to be reversed end to end in species 2.

Deletion ❌❌

I am sure it's not feasible because deletion entails removal of a few sequences.

It can be seen that species 2 is longer than species 1, which gives another reason why deletion is not feasible too, as no sequences are seen to be deleted.

I believe duplication is feasible since AATT sequences are repeated once.

Our final answer,

inversion and duplication occur here.

4 0
3 years ago
Male body cells only have one X chromosome, while females have two X chromosomes. It is hypothesized that if both X chromosomes
Dmitry [639]

C X-inactivation "switches off" one of the X chromosomes.

Explanation:

3 0
3 years ago
What process is involved in over irrigation that results in the reduction of soil fertility? A) Water penetrates the deep soil l
Olegator [25]

i believe the answer is B, Salt accumulates near the surface of the soil.

7 0
3 years ago
Read 2 more answers
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