Ques: Q: What carry messages from our sensory organs and others to the central nervous system? Choices: - fibers - valves - blood vessels - nerves A:
Ans: nerves

Ques: Q: What substances digest the food in the vacuole of an ingestive protist? Choices: - carbohydrates - lipids - hormones - enzymes A:
Ans: enzymes

Ques: Q: The major component of a solution is called what? Choices: - solute - mixture - water - solvent A:
Ans: solvent

Ques: Q: What occurs when substances move from areas of lower to higher concentration or when very large molecules are transported? Choices: - migration - diffusion - passive transport - active transport A:
Ans:
active transport