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Sergeu [11.5K]
3 years ago
15

Why do the changes you describe in part b provide an example of a cycle ?

Biology
1 answer:
vladimir1956 [14]3 years ago
3 0
What is part B I need more info.
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The Great Oxygen Event marks the time, approximately 2.5 billion years ago, when ________.
Leokris [45]

Answer :There was enough oxygen in the atmosphere to support a major burst of life on Earth

Explanation:

The Great Oxygen Event marks the time, approximately 2.5 billion years ago, when there was enough oxygen in the atmosphere to support a major burst of life on Earth

For the first half of the Earht's history, there was no oxygen in the atmosphere. It was inhabited only by single-celled organisms.Of  those simple life forms, the cyanobacteria may have. evolved a way to take energy from sunlight, and used it to make sugars out of water and carbon dioxide. They used the same chemical process we know as photosynthesis. This released vast quantities of oxygen into the atmosphere and  triggered the evolution of complex life.

3 0
3 years 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
What is one way the sun is the same as other stars
Juliette [100K]
Its made up of gas and basicaly is a star


6 0
3 years ago
Read 2 more answers
Why is it unlikely that one gamete would have the “best” traits of both parents
pav-90 [236]

The best trait isnt always dominate

4 0
3 years ago
Next, you explored mutations by transcribing and translating mutated versions of that original gene. When you transcribed and tr
umka2103 [35]

Answer: hello some details relating to your question is missing below is the missing detail

DNA Sequence= 3’ - TACTAGTTGTGCATT - 5’

Complementary Sequence=5`-ATGATCAACACGTAA-3`

Answer : MINT

Explanation:

The protein ( sequence of amino acids ) that resulted from your Translation is MINT

The m-RNA Produced form the information above is:

 5`-AUGAUCAACACGUAA-3`

While the Protein Sequence is Met-Ile-Asn-Thr which can be written as MINT

7 0
3 years ago
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