Just do the first part please

In a relatively small iguana population the allelic frequency is tracked for three generations. webbing is a recessive allele; no webbing is the dominant allele. during one very rainy spring and summer, a flood washes all the iguana without webbed feet out to sea. by the fall, and three generations later, you have the gene pool seen here.

What are some aquatic organisms that live in cold water temperatures?

Of seawater increases with decrease in the temperature. therefore, the cold water sinks to the deeper layers at the bottom