Bio 181-Nc State |118 Questions| With Correct Answers.

How do cnidarians feed? {Ans: they paralyze prey with stinging cells, then consume it.}How does the term "nitrogen fixation" relate to prokaryotes? {Ans: some bacteria can convert atmospheric nitrogen into ammonia.}Extreme Thermophiles {Ans: live in volcanic springs, live in hydrothermal vents, most are Archaen, makes enzymes that are used for genetic research}Which of the mollusk groups contain animals with a single, coiled shell? {Ans: gastropods}Most modern fish differ from sharks in that {Ans: They have skeletons of bone}Condition of earth at time protocells appeared {Ans: No oxygen, carbon dioxide, carbon monoxide, nitrogen, and water vapor. 1st forms of life could not utilize oxygen.}