Which of these is required for natural selection to occur?

a. un-equal reproductive success.

b. inheritance.

c. individual variation.

d. all of the answers are correct.

Two species of grasshoppers live in the same area. They both feed on plants, but the presence of one species does not affect either the survival or the reproduction of the other. What type of competition is this? a. Interference b. Exploitative c.

Imagine a change in the iguana's habitat from dry land to aquatic. Based on the Generation I allelic frequencies, we can assume only a small percentage of iguanas had webbed feet and were able to survive.

State one reason that there are more earthquakes in the western section of the united states?

What is melanin and what is its role in the epidermis?

What part of the body uses active transport to take up nutrients after concentration has reached equilibrium? A. Lungs B. Stomach C. Small intestine D. Liver

What biome does new york state belong too?

Acute coronary syndrome (acs) is a blanket term that refers to:

Which of the following are true of a bacterial cell but not an animal cell? Does not have a distinct nucleus. Has a cell wall. Does not have a cell wall. Has a nucleus containing chromosomes

In what type of mine would a rock burst most likely happen? an above-ground biomining site using mine waste a large longwall mine an open-pit mine with a large tailing pond a strip mine near a water supply

Which factor has most likely affected the high fertility rate in Africa? A. Good medical care B. Strong economy C. Lack of education D. More birth control