Q: Where are the olfactory organs of snails located? Choices: - their feet - their anus - their shell - their tentacles A:
their tentacles

Q: Many enzymes require nonprotein helpers for what activity? Choices: - hydrogen - kinetic - functional - catalytic A:
catalytic

Q: What organ protects the body from injury, water loss, and microorganisms? Choices: - heart - hair - liver - skin A:
skin