A dna molecule has a unique design that resembles a spiral staircase. scientists call this design a a. double helix. b. spiral structure. c. double nucleotide. d. spiral purine.

Which of the following correctly describes the relationship between monosaccharides and starches? A. Monosaccharides are the building blocks from which starches are made. B. Starch is the commonly used name for all monosaccharides. C.

What homeostasis is

Describe 4 ways that drugs influence the nervous system

What is the main difference between an endothermic reaction and an exit hermit reaction

Which phrases describe types of freshwater wetlands? Select three options

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