Q: Because all animals require an external source of what, they are called heterotrophic? Choices: - fuel - energy - water - food A:
food

Q: The volume of a gas is comprised of about 10% matter. what is the rest? Choices: - open space - instead space - normal space - empty space A:
empty space

Q: Q: Body plans do provide a succinct way to compare and contrast what? Choices: - degenerative animal features - missing animal features - distinctive animal features - key animal features A:
A: key animal features

Question: Q: Which part of the nephron collects wastes in the blood? Choices: - filter - vesicle - waste sac - tubule A:
Answer: tubule

*Question*
Q: What term refers to the union of a male and female of the same species for reproduction? Choices: - evolution - life cycle - behavior - mating A:
**Answer**
mating

(Q).
Q: What are the cliffs called which are created when waves erode a rocky shoreline, leaving a vertical wall of exposed rock layers? Choices: - shear face - widow-makers - wave - theory - wave-cut A:
(A).
wave-cut