Apopulation of snakes that eat small rodents enters a new habitat. in the new habitat, there are many species of rodents, and their populations are high because there are few natural predators. what will most likely be the effect on the genetic variation of the snake population?
genetic variation will increase because of a selective pressure.
genetic variation will increase because of a new habitat and food source.
genetic variation will decrease because of a selective pressure.
genetic variation will decrease because of a new habitat and food source.

Option B, Genetic variation will increase because of a new habitat and food source.

Explanation:

There are three positive scenarios about the new environment in which the snakes have entered -  

a) There are different varieties of rodent

b) The population of rodent is high due to less number of predators.  

c) Low population of predators other than the snakes (Limited competition)

Hence, snakes will have ample supply of food in the new sphere as there is very low competition among the predators (due to low population of other predators) and also there are varieties of rodent. Due to ample supply of food and limited competition with other predators , snake population will increase and thus the genetic variation will also increase due to increased rate of breeding.

Thus, option B is correct.

when a reversible reaction is occurring in both directions at the same rate; the products and reactants do not change in concentration. a chemical reaction where the compound is broken into its constituent parts.

cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are  important factors here. as a cell increases in size, its surface area and volume increase as well.  we call that the surface area to volume ratio (sa: vol).  but the catch is that  volume increases at a greater rate than surface  area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow!   check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!