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iogann1982 [59]
3 years ago
14

Which type of rock usually underlies a karst landscape?

Biology
1 answer:
Marizza181 [45]3 years ago
7 0
The answer you are looking for is limestone :)
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Which of the statements regarding the cell cycle is true? Group of answer choices It is regulated by cyclins and CDKs. Different
MA_775_DIABLO [31]

Answer:

All of these choices are correct.

Explanation:

Cell cycle is the process of growth and division of cell. It comprises of interphase and mitosis. In interphase the cell grows, replicates its genomic content and prepares itself for division. In mitosis the division occurs.

Cell cycle is controlled by a group of kinases called as Cyclin dependent Kinases (CDKs). They act by phosphorylating their substrates. They are of various types like Cdk1, Cdk2, Cdk4 etc. They become active when they bind to a regulatory protein called cyclin. They are also of various types like Cyclin A, Cyclin B, Cyclin C etc. Level of cyclin and corresponding CDK increases and decreases according to the stage of cell cycle. For example in S phase of cell cycle concentration of cyclin A and E shoots up. CDK2 is able to bind to these cyclin molecules and hence it becomes active.

Cell cycle has major checkpoints where the condition of cell is analysed before it proceeds to the next stage of cycle. If any abnormality is detected, repair mechanism is activated or the cell is killed. Checkpoints do not allow cell cycle to proceed in damaged cells.

p53 is a tumor suppressor protein which can halt cell cycle when it detects some abnormality in cell. It usually acts in G1/S checkpoint (before the DNA replication starts in cell) and G2/M checkpoint (before the cell division begins). Hence, all of the above statements are true.

7 0
3 years ago
Need help answering this thanks.
adell [148]

Answer:

its tongue and camouflage

Explanation:

5 0
2 years ago
Read 2 more answers
A population of white moths lives in a forest near a factory. this factory burns coal and pollutes the air with black dust. over
marissa [1.9K]
The answer to your question is option b

This is because if the trees are black, and covered with soot due to the pollution, caused by industrialisation, the white moths will be easily seen and constantly hunted by the predator, compared with the black moth population as they camouflage easily. Ultimately, the white moths would be hunted to such an extent that their population would dramatically decrease
8 0
3 years ago
What are substances that do not dissolve called
KonstantinChe [14]

its called a solution

hope it helped

4 0
3 years ago
What types of cells do not undergo mitosis
nignag [31]
Plant cells? maybe? i learned this last year
5 0
3 years ago
Read 2 more answers
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