What is composed of amino acids and determines all the structures and functions of organisms

An opaque object is placed in front of a spotlight which does not occur A. Absorption B. illumination C. reflection D. transmission

If a cell contains 4 chromosomes how many chromosome will a healthy gamete have

In the equation E = m * c ^ 2 what does c representi

Which of the following accurately describes algal blooms? A. Algal blooms tend to free up nutrients. B. Algal blooms provide additional oxygen to a body of water. C. Algal blooms often supply nutrients for fish and invertebrates. D.

All of the following are types of passive transport except Group of answer choices facilitated diffusion endocytosis diffusion osmosis

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