Let's calculate the difference in nucleotides. The number of difference multiplied by rate of mutations will help to determine how long ago these two species shared a common ancestor.
Species A: GTACCTAAGTTCACCGAATT
Species B: GAACCTAAGGGCACCGAACT
These species differ in 4 nucleotides.
This number should be multiplied <span>by </span>the rate of mutations
You would add H+ ions if you added an acid. Thus lowering the pH.
There are sometimes similarities in the embryonic stages of organisms that do not exist in the adult stages.
Answer:
I believe the answer is D for the top one