A farmer decides to plant his crops in a desert. What adaptation would give them the greatest advantage in this climate?
A. C3 photosynthesis
B. Mycorrhizal association
C. C4 photosynthesis
D. Mycoheterotrophy
E. Symbiosis
C. C4 photosynthesis
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Which structure or compartment is separate from the apoplastic route?
A) the lumen of a xylem vessel B) the lumen of a sieve tube C) the cell wall of a mesophyll cell D) the cell wall of a root hair
The light-independent reactions of photosynthesis ____.
A. fix carbon dioxide B. release oxygen C. cannot occur in light D. generate ATP E. use ADP
From the Luria-Delbruck fluctuation test, when would mutations arise in yeast cells to allow for survival in the presence of toxic levels of hydrogen peroxide?
A) Mutations are adaptive and would have appeared after most of the cells died in the presence of hydrogen peroxide. B) Mutations are adaptive and would have formed prior to being exposed to hydrogen peroxide. C) Mutations are random but would not have formed until after the hydrogen peroxide was introduced. D) Mutations are adaptive and would have appeared immediately in response to the hydrogen peroxide. E) Mutations are random and would have appeared prior to being exposed to hydrogen peroxide.
If a codon is three nucleotides and there are four different nucleotides, how many different codons can be made?
A) 64 B) 3 C) 28 D) 120 E) 12