Ques:Q: In how many basic was can substances cross the plasma membrane? Choices: - one - three - four - two A:

Ans:two
-----
Ques:Q: Lead shielding is used to block what type of rays? Choices: - ultraviolet - alpha - toxic - gamma A:

Ans:gamma
-----
Ques:Q: How do prokaryotes reproduce? Choices: - inorganically - sexually - unusually - asexually A:

Ans:asexually
-----
Ques:Q: Some 96% of the dry mass consists of organic compounds produced by what? Choices: - erosion - electrolysis - reproduction - photosynthesis A:

Ans:
photosynthesis
-----