What is a phagolysosome?
a. A protein that covers the surface of an invading microbe, making it easier for the phagocyte to ingest.
b. A vesicle containing only digestive enzymes and other antimicrobial compounds.
c. The structure that results from the fusion of a phagosome and a lysosome.
d. A vesicle containing only an engulfed invading microorganism.
Ans: c. The structure that results from the fusion of a phagosome and a lysosome.
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After his return to England, Darwin most pondered which question?
a. What could explain the great numbers and variety of species? b. Does the fossil evidence support uniformitarianism? c. Are the extinct and living armadillos the same species? d. Did Galápagos mockingbirds have a common mainland ancestor? e. Will natural selection work in England?
What is the process that eventually leads to the death of a plant?
A. perennial B. abscission C. outcrossing D. dichogamy E. senescence
Once amino acids are hydrolyzed from proteins, the energy can be harvested in cellular respiration pathways
A. as an intermediate molecule within the Krebs cycle. B. after slight modification to become acetyl CoA. C. after the ammonia group is removed. D. as in all of these answer options, with only minimal modification required. E. after slight modification to become pyruvate.
All of the populations of different species that
occupy and are adapted to a given area are a. the biosphere. b. a community. c. an ecosystem. d. a niche. e. an ecotone