Which is an external stimulus?

A. Thirst

B. Hunger

C. Pain

D. Heat

Compare and contrast autotrophs and heterotrophs

Why is water so effective at hydrogen bonding

What is an advantage of using nuclear power? A. Nuclear power is generated at a lower cost than traditional methods B. Nuclear power produces less pollution than traditional methods C. Nuclear power is more efficient than traditional methods D.

If a mother with type o blood and a father with Type AB blood have a child, what is the probablity that the offsprong will have Type A blood? A. 50% B. 0% C. 25% 100%

Which of the following is NOT a function of the upper respiratory tract? A) warming incoming air B) filtering incoming air C) exchanging gases with blood D) moving air toward lower respiratory tract E) reabsorbing water from outgoing air

Select the correct answer. How is a conductor different from an insulator? A. The free movement of electrons within a conductor permits the transfer of charge. B. The free movement of protons within a conductor permits the transfer of charge. C.

Compare the hibiscus and spider lily pollen grain structure

Which macromolecule is responsible for catalyzing biochemical reactions?

The crystals of a mineral are always the same size.

Suppose two suspects in a crime have dna profiles that match the one dna fragment tested what should happen next