Ques: Q: Sediments in oligotrophic lakes contain large amounts of what? Choices: - algae - fertilizer - igneous rocks - decomposable organic matter A:
Ans: decomposable organic matter

Ques: Q: In their pure form, all elements have an oxidation number of what? Choices: - 3 - 2 - 7 - zero A:
Ans: zero

Ques: Q: Angiosperms produce their gametes in separate organs, which are usually housed in these? Choices: - leaves - stems - seeds - flowers A:
Ans: flowers

Ques: Q: Muscle contraction requires repeated cycles of binding and what? Choices: - twisting - push - lunging - release A:
Ans:
release