Which organisms contain jaws and limbs

Referring to a plant's sexual life cycle, which of the following terms describes the process that leads directly to the formation of gametes? a. sporophyte meiosis b. gametophyte mitosis c. gametophyte meiosis d. sporophyte mitosis e.

What should be true of fossils of the earliest tetrapods? A) They should show evidence of internal fertilization. B) They should show evidence of having produced shelled eggs. C) They should indicate limited adaptation to life on land.

Why are protozoa significant? Select all that apply. Protozoa contaminate the water supply. Protozoa do not contribute to a food chain. Some protozoa clean polluted water. Some protozoa are parasitic and cause diseases like malaria.

Both epinephrine (a tyrosine derivative) and glucagon (a peptide hormone) increase glucose export from the liver into the bloodstream. Each ligand binds a different receptor, but both lead to an activation of PKA. How does this happen?

Differentiate between the types of population growth models that can increase or decrease the elephant population.

In this biome you will find many evergreens tree. They don't lose their leaves and they are triangle shaped so their branches won't hold snow and break. This biome is found in Canada and Russia what biome is this?

The drought alone did not cause the dust bowl. It was combination of several things, the drought and

Ecology is made up of

Why does a temperature inversion trap smog and prevent it from dispersing

Turgor pressure is the result of: A) the activity of the contractile vacuole. B) water accumulation within a cell. C) the rigidity of the plasma membrane. D) All of these choices are correct.