In photosynthesis, carbon fixation occurs
A. in photosystem II.
B. during photorespiration.
C. in the Calvin cycle.
D. in photosystem I.
E. in the electron transport chain.
Answer: C
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In certain plants, tall is dominant to short. If a heterozygous plant is crossed with a homozygous tall plant, what is the probability that the offspring will be short?
A) 1 B) 1/2 C) 1/4 D) 1/6 E) 0
A gradual rise in numbers during an epidemic indicates a common source epidemic
Indicate whether this statement is true or false.
Steroid hormones can trigger gene expression in a select number of cells because ____
a. only target cells allow the steroid hormone to cross the plasma membrane b. nontarget cells have a steroid hormone response element encoded in their DNA c. only target cells have the correct receptor in their cytosol to bind to the hormone d. nontarget cells lack the genes found in target cells e. only target cells have the genes that steroid hormones activate
A biologist discovers an algae that is marine, multicellular, lives at a depth with very little light, and is highly branched. This algae probably belongs to which group?
a. red algae b. brown algae c. green algae d. dinoflagellates e. golden algae