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kodGreya [7K]
3 years ago
13

What could contribute to a mass extinctions event

Biology
1 answer:
BabaBlast [244]3 years ago
3 0

Answer:

1/ Climate change

2/ Asteroid impacts

3/ Massive volcanic eruptions

4/ Sun explodes

etc. (all the things above are most likely to happen but alien invasion or things like that is also a theory that you can add depends mostly if you like it or not)

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Which of the following is true about the chromatids?
kipiarov [429]

It represents the split chromosome is true about the chromatids.

<h3>What are the chromatid's characteristics?</h3>

One of a chromosome's two identical halves that has undergone replication in order to facilitate cell division is referred to as a chromatid. The centromere, a constrictive area of the chromosome, serves as the connection between the two "sister" chromatids.

<h3>What is a chromatid's purpose?</h3>

It permits cells to store two copies of their info in order to get ready for cell division. This is crucial to ensuring that daughter cells are strong and completely functional, carrying the entire complement of DNA from the parent cells.

To know more about chromatid's visit:-

brainly.com/question/29108845

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1 year ago
If thymidine dimers created by UV irradiation persist until DNA replication, DNA polymerase is likely to make a mistake reading
marishachu [46]

Answer:

Thymidine dimers is likely to be repair as soon as it is originated but if left unrepaired then it causes  frame shift mutations.

Explanation:

In case of Bacterium if UV irradiation induces covalent linkage of two thymidine present adjacently to each other or on a single strand to make thymidine dimers.

These either excised via DNA repair enzyme like Endonuclease V and the proof reading activity of DNA polymerase I enzyme help in incorporation of nucleotide by taking the unmutated original strand as a template.

These dimers if not excised before second round of replication than the sequence of newly synthesized strand will be altered. As DNA polymerase III enzyme read thymidine dimers as single thymidine nucleotide and incorporate only 1 adenine in the newly synthesizing complementary strand which results in frame shift mutations

It is the mutation in which reading frame of codons is shifted or altered due to deletion or addition of a single nucleotide.

7 0
3 years ago
How did this rock form?​
umka21 [38]

I would say fossilization

8 0
3 years ago
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Which diet promotes the greatest loss of body heat?
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A diet that consist highly of fruits with lots of vitamin c and vegetables along with coconut water and pomegranate juice can help maintain body heat and not lead to it over heating and of course lots of cold water. Milk with a bit of honey could also help.

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