What are the atmospheres of Venus and Mars primarily composed of?

A.) At

B.) O2

C.) N2

D.) CO2

The gradual development of a species into a new one to survive. A. Natural Selection B. Evolution Which one?

Referred to as "upright human"; believed to have used tools, hunted, built fires, lived in caves

Which of the following organisms is most likely to survive? A. the top carnivore in a food chain B. a herbivore in a food chain C. the top carnivore in a food web

The subatomic particles that govern potential chemical reactions among elements are

Why is the phosphorus cycle not considered as a real cycle?

When can a primary succession occur?

Friction between a skateboard wheel and the surface produces?

What are two functions of the cell membrane

Why can eukaryotes carry out more specialized functions than prokaryotes can? A) eukaryotes have more organelles B) Prokaryotes have more organelles C) eukaryotes are bigger D) prokaryotes are bigger

How might mendel's conclusions have differed if he had studied two traits determined by alleles carried on the same chromosome?