The oxygen released in photosynthesis comes from ____.

A. carbon dioxide
B. glucose
C. ribulose bisphosphate
D. water
E. atmospheric oxygen


Ans: D. water

Biology & Microbiology

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Which one of the following is not an ecosystem service? 

A. maintaining the quality of water supplies B. habitat restoration C. preventing soil erosion D. absorbing pollutants E. moderating climate

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Which of the following is mismatched regarding helicase activity?

A. ATP coupling stoichiometry: ATP consumed per base pair traversed B. step size: average number of base pairs covered per ATP C. processivity: numbers of base pairs replaced D. directionality: defined direction of movement E. oligomeric state: helicase functioning in multiples

Biology & Microbiology

The structure labeled "4" in the figure is a(n) ____

a. asexual spore b. haploid spore

c. zygospore d. gamete e. spore sac

Biology & Microbiology

The Earth's carrying capacity is:

a. 1 billion. b. 1 million. c. 4 billion. d. 16 billion. e. unknown.

Biology & Microbiology