Aquaculture currently can raise all except:
a. shrimp.
b. swordfish.
c. clams.
d. oysters.
e. salmon.
B
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The __________ is a circular molecule of DNA that
resides in a region of cytoplasm called the __________. Fill in the blank(s) with the appropriate word(s).
Humans are susceptible to scurvy because
A. they do not have enough adipose tissue for vitamin A storage. B. they cannot synthesize vitamin C. C. they have a high incidence of fruit allergies. D. constant seasickness and nausea on long voyages leads to weakness and anemia. E. they cannot synthesize amino acids.
Evolution is genetic change in __________ that occurs over time
a. an individual b. a population c. a community d. an ecosystem e. the biosphere
Different geographical barriers physically separated the tortoises on the Galápagos Islands. This separation resulted in the evolution of subspecies. This is an example of _____ speciation.
a. prezygotic b. postzygotic c. sympatric d. outgroup e. allopatric