The development of a body plan with differentiated cells is achieved by ________
a. repression of mRNA translation
b. expression of different genes in different embryonic cells
c. absorption of specific proteins and enzymes
d. suppression of proteolytic enzymes
b
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What is the function of ribosomes?
a. plasma membrane stabilization b. receiving raw materials from the environment c. polypeptide assembly d. increasing tonicity e. directing the activity of DNA
Sickle-cell disease is a disorder that is caused by
A. a single mutation on a single gene. B. a collection of mutations that span several different genes. C. a collection of genetic mutations and environmental factors. D. a collection of mutations on a single gene.
The fruits of plants primarily function in
A. providing food for animals. B. seed protection. C. both protecting and dispersing seeds. D. seed dispersal. E. both feeding animals and protecting seeds.
Kinesis is
A. a nondirectional movement in response to a stimulus B. a movement away from a stimulus. C. a movement toward a stimulus. D. the cessation of movement in response to a stimulus E. movement due to associative learning