All cells contain this. The purpose is to direct cellular activities, including protein synthesis.

A) DNA

B) nucleus

C) ribosomes

D) plasma membrane

How do plants respond to different environmental stimuli?

Why do you think digestion is more efficent if you are sitting up?

Which of the following has a negative electrical charge? o cation only o anion only O Both cations and anions have negative charge.

What Type of skeleton (ENdoskeleton, EXoskeleton, or None) do Cnidarians have

Mantle material rises in convection currents because heated materials become more dense. truth or false

The United States uses which source of energy to produce almost 40 percent of its electricity? A. solar B. water C. biomass D. wind E. coal

Which cell breaks down carbohydrates

What characteristic distinguishes the five groups of fungi?

A research colleague has provided you with a single cell to identify. briefly describe the steps you would take to determine which domain this cell would most likely belong to.

A new organism is discovered in the forests of Costa Rica. Scientists there determine that the polypeptide sequence of hemoglobin from the new organism has 72 amino acid differences from humans, 65 differences from a gibbon, 49 differences from a