Q: Shortening of muscle fibers is called what?' Choices: - diffusion - diffusion - shrinking - contraction A:
contraction

Q: Which is the process through which leaves collect sunlight and make food? Choices: - Greenhouse - compress - richness - photosynthesis A:
photosynthesis

Q: Q: What natural destructive element cuts away at rock forming river valleys? Choices: - sediment - lava - air - water A:
A: water

Question: Q: "endocrine" and "exocrine" are two types of what? Choices: - organs - fluids - cells - glands A:
Answer: glands

*Question*
Q: What do organisms use to grow and repair themselves? Choices: - diffusion - mutation - cell solution - cell division A:
**Answer**
cell division

(Q).
Q: Electrons flow through wires to create what? Choices: - electromagnetism - hydroelectric power - balanced reaction - electric current A:
(A).
electric current