1. Simple diffusion is defined as the movement of
OA) molecules from areas of higher concentration to areas of lower
concentration
B) molecules from areas of lower concentration to areas of higher
concentration.
C)
water molecules across a membrane.
D) gas molecules across a membrane.
OE) gas or water molecules across a membrane.

What are two ways in which waves erode the land?

In this case, the statement that people who exercise for an hour may have lower cholesterol levels is .

Examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. polyploidy is creating new species. the two populations are not interbreeding freely. hybrid offspring of the two populations begin to appear. one species will increase into a population size twice as large as the other species.