Q: What type of protein fibers in the cytoskeleton are the narrowest? Choices: - macrophages - mitosis - capillaries - microfilaments A:
microfilaments

Q: Compounds that form from two or more nonmetallic elements are called what? Choices: - ionic bonds - valent bonds - hydrogen bonds - covalent bonds A:
covalent bonds

Q: Q: Plants can lose their leaves, flower, or break dormancy in response to a change in what? Choices: - events - periods - averages - seasons A:
A: seasons

Question: Q: What is formed when humid air near the ground cools below its dew point? Choices: - steam - weather - smoke - fog A:
Answer: fog

*Question*
Q: When do the eggs in a female's ovaries start to mature? Choices: - maturity - adolescence - adulthood - puberty A:
**Answer**
puberty

*Question*
Q: Mollusks such as squid and octopi, which must hunt to survive, possess what complex organs containing millions of neurons? Choices: - gills - hearts - tentacles - brains A:
**Answer**
brains