The electrons flowing through the electron transport chains in photosynthesis originate from ____ and are transported to the carbon reactions by _____.
A. NADPH; oxygen
B. oxygen; NADPH
C. NADPH; water
D. water; NADPH
E. oxygen; water
D. water; NADPH
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The plant leaf surface is called the rhizosphere.
Answer the following statement true (T) or false (F)
Which type of species are adapted to stable, predictable environments?
a. r-selected species b. s-selected species c. k-selected species d. j-selected species
European cuckoo birds lay their eggs in the nest of other bird species, allowing the other birds to raise their young. The cuckoo birds are therefore:
a. foster parents b. commensals c. endosymbionts d. brood parasites e. ectoparasites
Which of the following is true concerning transport
proteins in the neuron membrane? a. Only sodium is actively transported. b. Only potassium is actively transported. c. Passive transporters with open channels prevent ions from leaking across the membrane. d. Active transporters move ions against their concentration gradients. e. It takes energy to move ions through passive transporters.