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Elena L [17]
4 years ago
12

Wich phase of the cell cycle is most affected by cytarabine

Biology
1 answer:
melisa1 [442]4 years ago
7 0

Its mode of action is due to its rapid conversion into cytosine arabinoside triphosphate, which damages DNA when the cell cycle holds in the S phase (synthesis of DNA). Rapidly dividing cells, which require DNA replication for mitosis, are therefore most affected.

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Birds lay eggs that have much harder shells than reptile
mamaluj [8]

Answer:

D

Explanation:

bird eggs don't need additional moisture that some reptiles absorb with their eggshells

4 0
3 years ago
Read 2 more answers
nucleotide substitutions occur by mistake in a segment of ribosomal rna at a constant rate of one substitution every 100,000 yea
harkovskaia [24]

The number of years of divergence from a common ancestor =300,000 years.

<h3>What are mutations?</h3>

Mutations are changes that occur in the DNA of living organisms.

Mutations can be used as molecular clocks if they occur at a constant rate.

Considering the nucleotide substitutions occur by mistake in a segment of ribosomal RNA at a constant rate of one substitution every 100,000 years.

The ribosomal RNA of the two modern-day species have six differences in their sequences.

Number of years of divergence = 6/2 * 100000 = 300,000 years.

In conclusion, changes that occur in nucleotide sequences are known as mutations.

Learn more about mutations at: brainly.com/question/12572634

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4 0
1 year ago
Which word equation represents a process that requires the presence of light and chlorophyll?
hoa [83]

Answer:

photosynthesis that's the answer

3 0
3 years ago
Consider how plate tectonics affects weather and ocean currents, ecological niches and formation of geological structures such a
NeTakaya

The convecting mantle, upon which the tectonic plates lie, is what moves them. These plate movements may be responsible for both obvious geologic occurrences like earthquakes and volcanic eruptions as well as more subdued yet exquisite ones like the formation of mountains.

Mountains and volcanoes that arise as a result of the movement of the plates can also influence the climate. The climate may be affected by large mountain ranges by altering air circulation throughout the world. Mountains, for instance, may cause warm air to be redirected to colder areas.

The distribution, size, and depth of ocean basins are determined by the movement of tectonic plates, which also affects how water is distributed across the continents.

To learn more about tectonic plates, refer

brainly.com/question/19317822

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8 0
1 year ago
The cell cycle is:_____.
Nat2105 [25]
The answer to this would be A
3 0
2 years ago
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