2. If the climate were to change in an environment, it is more likely that some individuals within a
population will survive if
a. the individuals stop reproducing.
b. the individuals are genetically
identical.
c. there is genetic variation within the
population
d. the individuals reproduce asexually.

C, there is genetic variation within the population

Explanation:

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.

the law of original horizontality explains:   why rocks appear in layers. correct answer: b the law suggests that all rock layers are originally laid down (deposited) horizontally and can later be deformed.   the principle is used by geologists to make assumptions about the relative ages of sedimentary rocks.