Ques: Q: What substance, involved in most biochemical reactions, is essential to life? Choices: - carbon - nitrogen - air - water A:
Ans: water

Ques: Q: What substance is removed from waste as it passes through the large intestine? Choices: - blood - nutrients - air - water A:
Ans: water

Ques: Q: Where do lancelets live? Choices: - on land - riverbeds - deep sea caves - shallow ocean water A:
Ans: shallow ocean water

Ques: Q: Deposition refers to when a gas changes to what state? Choices: - half liquid half gas - liquid - plasma - solid A:
Ans:
solid