In the condition called athlete's foot, the fungus Trichophyton consumes the keratin protein found in hair, nails, and dead skin. Which of the following descriptors does not apply to Trichophyton?
A. Saprobe
B. Parasite
C. Eukaryote
D. Heterotroph
Answer: A
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Which organelle has enzymes that break down fatty acids, amino acids, and toxins?
a. lysosomes b. peroxisomes c. Golgi bodies d. vacuoles e. rough ER
A community refers to ____
a. the interaction between populations and their environment b. the interaction between species and their environment c. an area in which a single species lives d. all species that live and interact in a specific area e. the nonliving components of an area
Compared with young trees growing out in the open,
young trees growing in a darker forest understory tend to have longer, thinner trunks with less branching. This developmental pattern is principally caused by a. phototropism. b. thigmotropism. c. activated phytochrome being converted to inactive phytochrome. d. inactive phytochrome being converted to active phytochrome. e. none of these.
Camptodactyly
A. causes bent, immobile little fingers. B. is inherited as a dominant trait. C. shows less than complete penetrance. D. shows varying expressivity. E. is characterized by all of these.