Why is a mammalian eye cell different from a tongue cell?
a. Different combinations of the available genes are used.
b. Different cell types contain different genes.
c. Different cell types eliminate unneeded genes.
d. Different numbers of chromosomes are found in those cells.
Answer: a. Different combinations of the available genes are used.
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a. aphids. b. leeches. c. earthworms. d. ticks.
Which of the following pairs is mismatched?
a. nucleolus-ribosomal RNA b. nucleus-DNA replication c. lysosome-protein synthesis d. cell membrane-lipid bilayer e. cytoskeleton-microtubules
During the time American youth are awake, the activity that consumes more of their time than any other is:
A. sports B. media involvement C. sex D. school E. Unanswered
Which of the following scenarios represents a situation where a suspected disease-causing microbe would not be consistent with one or more of Koch’s postulates?
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