The energy captured by photophosphorylation is used to produce glucose
A. through the Calvin-Benson cycle.
B. through the Citric acid cycle.
C. by cyclic phosphorylation.
D. through the pentose-phosphate pathway.
E. by beta-oxidation.
Answer: A
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The characterization of prions demonstrated that:
A. this viruslike structure can cause disease. B. secondary structure of a prion can cause disease. C PrPC causes disease. D. this viruslike structure and secondary structure of a prion can both cause disease. E. secondary structure of a prion and PrPC both cause disease.
Ferns are particularly useful for research on plant growth and development because of the ____
a. numerous, large apical cells on the edges of their fronds b. single, large apical cell on the tip of their fronds c. single, large apical cell at the tip of their apical meristems d. numerous, small apical cells at the base of their apical meristems e. single, small apical cell at the base of their apical meristems
__________ promotes senescence and abscission. It also inhibits growth of roots and stems. Fill in the blank(s) with the appropriate word(s)
The tropics are known to have greater species diversity than the temperate zones.Which explanation for this phenomenon is the LEAST convincing?
A. Fewer predators in the tropics allow more prey species to flourish. B. Niches are narrower in the tropics. C. The tropics have greater plant production, which supports greater overall species richness. D. Seasonal variability is less in the tropics. E. Greater spatial heterogeneity in the tropics creates more niches.