I believe the thyroid controls most, if not all of those things. (Again, I'm not entirely sure.)
Explanation:
they used the amino acid to find the DNA base sequence
So the answer for (a) is basically the enzyme is breaking down the protein (which is the colored part) and this leaves the clear.
For the constants it would be the film and the temperature that the solution is at
For the final question, they could be improved by using more data and multiple trials
Answer:
Mutations to somatic cells are only present in the type of cell in which the mutation occurred.
Trial and Error
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