Most chytrids are ____
a. saprobes in soil
b. parasites of plants
c. symbiotic partners of cattle and other herbivores
d. parasites of animals
e. aquatic
E
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According to the textbook, prokaryotes absorb their nutrients from the environment; however, prokaryotes also have cell walls. What can you conclude from these statements?
A. Cell walls are permeable, allowing nutrients to pass through. B. Prokaryotes live in a hypertonic environment. C. Osmosis drives the movement of nutrients through the cell wall. D. Prokaryotic cell walls contain transport proteins.
Osteoporosis sometimes results from ____
a. excessive PTH secretion b. insufficient PTH secretion c. excessive intake of vitamin D d. excessive intake of iodine e. insufficient intake of vitamin D
Biomagnification usually happens for chemicals that
A. are not readily degraded. B. dissolve in fat. C. dissolve in water. D. are not readily degraded and dissolve in fat. E. are not readily degraded and dissolve in water.
Which component of a phospholipid is found in the interior of a lipid bilayer?
a. glycerol b. fatty acids c. phosphate group