The most abundant gas in the atmosphere is
a. carbon dioxide.
b. hydrogen.
c. nitrogen.
d. oxygen
C
Biology & Microbiology
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The ability to conjugate depends on the presence within the donor cell of a plasmid called the ____
a. X factor b. F factor c. C factor d. sex pilus e. S factor
Biology & Microbiology
True kidneys have tubules called
a. nephrons. b. hepatic tubules. c. metanephridia. d. Malpighian tubules. e. protonephridia.
Biology & Microbiology
__________ attach a gametophyte to soil or another
surface. Fill in the blank(s) with the appropriate word(s).
Biology & Microbiology
Which of the following cells have reduced or very little active telomerase activity?
A) most normal somatic cells B) most normal germ cells C) most cancer cells
Biology & Microbiology