Acertain segment of dna can be used as a molecular clock. its rate of mutation is one mutation per 10 million years. examine the dna segments from two different species: species a: cttaagctagtaaggacc species b: cataagttagtaaggtcc using this example, explain how this information can be used to determine how long ago these two species shared a common ancestor.

The correct answer would be 30 million years.

The molecular clock is a technique used to determine the time when the two species diverged from a common ancestor. It uses the mutation rate to determine the same.

Mutation rate is the rate at which a number of mutations take place in a given unit time.

For example, the mutation rate in a given question is one mutation per 10 million years, that is, one nucleotide is mutated in 10 million years.

If we compare the DNA sequence of the given two species, we would find that three mutations have taken place.

Species A: CTTAAGCTAGTAAGGACC  

Species B: CATAAGTTAGTAAGGTCC  

Thus, 30 million years would have passed to evolve three mutations.

Hence, they must have shared a common ancestor around 30 million years ago.

thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.

multiply it by 5 in order for you to understand i cant give an exact answer.