Hypothetically, if electron pools existed in sufficient numbers for enzymes to use in metabolic reactions,
A) a higher diversity of cytochromes would likely be observed.
B) cytochromes would be unnecessary for cells and quinones would be more important.
C) Q-cycle reactions would no longer be necessary for electron transport, but the proton motive force would otherwise be unchanged.
D) most metabolic pathways for both anabolism and catabolism would have to be rewritten.
Answer: D
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a. geese leaving their nests to fly south before the onset of winter b. male seahorses fertilizing eggs and carrying them until they hatch c. a gorilla living in a zoo feeding and protecting a stray kitten d. baby ducks following the first adult duck they see after hatching
Which group has a tentacle ringed mouth and a gastrovascular cavity?
a. sponges b. cnidarians c. flatworms d. annelids e. arthropods
With __________, an animal learns to associate an
involuntary response to one stimulus with another stimulus. Fill in the blank(s) with the appropriate word(s).
In plants, what are embolisms?
A) toxic acids produced when stomata are closed and it's sunny
B) formations of ice crystals when a plant is subjected to below-freezing temperatures
C) hormones that result in apical dominance
D) air bubbles that form within xylem