Which is not a characteristic of ribosomes?

A They make proteins from amino acids.

B They are made of DNA.

C They interpret instructions in genes.

D They float freely in the cell.

The dichotomous key illustrated here allows the classification of microorganisms based on their metabolic characteristics. Suppose some organisms ferment lactose but can't use citric acid for all their carbon needs. These organisms must be

Explain how a nymph grows or the molting process used for growing.

In terms of gravitational political energy, what happens to a ball as it rolls down a hill?

What happens to the cells of a salmon during spawning season when the fish returns to the river it was born in?

Fructose and glucose are examples of

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