A plant cell with 64 available ATP molecules could split how many N2 molecules with the assistance of nitrogenase?
A. 2
B. 4
C. 16
D. 32
E. 64
B. 4
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tends to be large.
a. cecum b. stomach c. large intestine d. pancreas
HIV infection and the subsequent destruction of which cell type is most devastating to overall immune system function?
A. natural killer cells B. memory B cells C. monocytes D. helper T cells E. cytotoxic T cells
The Casparian strip of the endodermis stops water from the ____ before it reaches the stele
a. symplastic pathway b. transmembrane and symplastic pathways c. transmembrane pathway d. apoplastic, transmembrane, and symplastic pathways e. apoplastic pathway
A drug designed to stop neurons from recharging would block the step in which ions
A. are actively pumped against their concentration gradient. B. spontaneously move down their concentration gradient. C. spontaneously move against their concentration gradient. D. are actively pumped down their concentration gradient. E. are in the resting potential state.