Pure water has a pH of 7.0, therefore, ____
a. [H+] < [OH-]
b. [H+] = [OH-]
c. [H+] = 0
d. [OH-] = 0
e. [H+] > [OH-]
ANSWER: b
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Paraquat is an herbicide that blocks the transfer of electrons from PSII. Mechanistically, paraquat is effective because it __________
A. prevents the reduction of NADPH B. prevents the formation of reactive oxygen species C. increases the formation of reactive oxygen species D. absorbs light energy that cannot then be used for photosynthesis E. increases cyclic electron transport, which does not produce NADPH
An astrocyte is a type of:
A. glial cell. B. sensory neuron. C. interneuron. D. motor neuron.
The above photomicrograph is of
a. mycelium. b. protistans. c. mycorrhizae. d. stolons. e. rhizoids.
The embryo normally implants in the
A) oviduct. B) labia minora. C) ovary. D) endometrium.