Question: Q: What substances are involved in most of the chemical reactions that take place in organisms, including digestion? Choices: - proteins - hormones - vitamins - enzymes A:
Answer: enzymes

Question: Q: Most lipid hormones are derived from what? Choices: - protein - tissue - fat - cholesterol A:
Answer: cholesterol

Question: Q: Collagen fibers, elastic fibers, and reticular fibers comprise what type of tissue? Choices: - nucleus tissue - intestine tissue - skin tissue - connective tissue A:
Answer:
connective tissue