Ques: Q: What does the armor including spines in some species offer? Choices: - nutrition - protection from cold - energy - protection from predators A:
Ans: protection from predators

Ques: Q: What is the air that remains after a forced exhalation called? Choices: - kinetic volume - abundant volume - remaining volume - residual volume A:
Ans: residual volume

Ques: Q: Some sea anemones establish what kind of relationship with hermit crabs by attaching to the crab's shell? Choices: - pathogenic - parasitic - predatory - mutualistic A:
Ans: mutualistic

Ques: Q: What type of bacteria change nitrogen gas from the atmosphere to nitrates in soil? Choices: - hydrophylic bacteria - multicellular bacteria - spiral bacteria - nitrogen fixing bacteria A:
Ans:
nitrogen fixing bacteria