The key distinction between invertebrate and vertebrate immune systems is that invertebrates seem to lack gene rearrangement and thus fail to produce soluble , among other things.

Because of its structure the cell membrane is known as a phospholipid ? a.bilayer b.molecule c.fluid d.barrier

Greenthe fossil record is the history of life recorded byhuman observationgod.climatologists.remains of the past.

Can bacteria reproduce in a way such that when you start out with two bacteria, you get five bacteria? why or why not? * a. yes, because bacteria reproduce sexually, and can produce any number of offspring, just as humans do. b. no, because bacteria grow at an exponential rate. c. no, because when bacteria reproduce, they split into two parts, and two bacteria splitting would result in four bacteria.