Which of the following is NOT an oxygenic phototrophic microorganism present in marine waters?
A) Ostreococcus
B) Prochlorococcus
C) Roseobacter
D) Trichodesmium
Answer: C
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All protists have cell walls
A. true B. false
On hot, dry days, what problem arises for C3
plants?
a. oxygen binds to rubisco’s active sites preventing carbon fixation b. with stomata open, they lose excessive water c. too much glucose is produced d. carbon dioxide fixes to RuBP instead of PGA e. the electrons from water bind to ADP instead of NADPH
The major source of water for precipitation onto land is ____
a. evaporation from oceans b. evaporation in the upper atmosphere c. evaporation from groundwater flow d. transpiration from land plants e. wind driven water vapor from oceans
If 14% of the nucleotides from a DNA molecule contain the base T, what percent will contain the base G?
A. 18% B. 28% C. 72% D. 14% E. 36%