What is the difference between a woody and herbaceous plant

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.

Depending on the organism the number of in a cell may change

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?