Q: The air bubbles resulting from cavitation expand and block water channels of the what? Choices: - heart - respiration - ectoderm - xylem A:
xylem

(Question)
Q: Which are the closest living relations to land plants? Choices: - mammals - arthropods - sporozoans - charophytes A:
(Answer)
charophytes

Ques: Q: Huge calderas form when the mountain above an empty chamber of what collapses? Choices: - gas - mercury - coal - magma A:
Ans: magma

(Q).
Q: What do all chemical reactions need to get started? Choices: - expression energy - kinetic energy - potential energy - activation energy A:
(A).
activation energy

Ques:Q: What are plant-like protists called? Choices: - fungi - sponge - spores - algae A:

Ans:algae

Q: What is a benefit of low sulfur coal over high sulfur coal? Choices: - greater enerty - lower cost - less erosion - less pollution A:
less pollution