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vekshin1
2 years ago
13

The cork and bark of trees are formed by ________.

Biology
2 answers:
Ber [7]2 years ago
5 0
Formed by the dead cells.
Andrej [43]2 years ago
3 0

they are formed by layers of dead cells and is produced by the formation of multiple layers of suberized periderm, cortical and phloem tissue.

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What type of mutation occurs when a nucleotide is added to the DNA?
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Answer:

A frameshift mutation.

Explanation:

A frameshift mutation is when one adds an extra nucleotide to a series of nucleotides. This will mess up the order of the nucleotide, thus when it forms the codons, and eventually, the amino acids; all of the codons are wrong, thus all of the amino acids are wrong.

In this situation, an extra nucleotide is added to a sequence of DNA, this results in all of the other nucleotides getting pushed over by (1). Thus, all of the nucleotides form the wrong codons and the wrong amino acids. Therefore, a frameshift mutation has occured.

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What must happen before meiosis can begin

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What would be the effect of a mutation in the coding region of the lactase gene?
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timurjin [86]

Answer:

scientific method

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