Answer:
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.
Answer:
could be either or, but the name of the shape is a double helix.
Explanation:
<span>All mammals have at least one X chromosome. Female mammals have two X chromosomes, so each of her eggs has a single X chromosome. Male mammals have XY chromosomes, meaning they can generate sperm containing the X chromosome, or sperm containing the Y. If the egg receives sperm containing the X chromosome, then the resulting individual forms ovaries, and is female.</span>
Answer:
Ionic bonds are formed when electron are transferred