Variation within a population is caused by *

pollution

Compare and contrast the growth of cloud droplets and the growth of ice crystals.

The different hurricane catagories are based on

Testes are adapted to produce

The primitive atmosphere of earth may have favored the abiotic synthesis of organic molecules because it:

What are character traits that people work toward, in order to become better human beings? A. Right B. Virtues C. Ethics D. Laws

What do amoeba proteus, dinoflagellate, and euglena viridis have in common? a. they all can move and make their own food b. they all can move and use eye spot to locate food c. they all can move and be heterotrophic d.

How is a scientific hypothesis best evaluated?

The overall population of a species decreased. What could have occurred to make this happen? The immigration rate increased, while the death rate decreased. The birth rate decreased, while the death rate increased.

Which of the following terrestrial biomes cannot be found in the United States? A: temperature deciduous forest B: tundra C: desert D: grassland/prairie

Which of these food sources does the bald eagle not feed on? plants fish carrion mammals