What special feature of the ovum is facilitated by the production of polar bodies?
A. triploidy
B. large size of the nucleus
C. extra layers of plasma membrane
D. large size of the cell
Answer: D
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In the figure above, diagram 1 represents
a. a molecule of chlorophyll. b. a phospholipid in the thylakoid membrane. c. a primary electron acceptor. d. an accessory pigment. e. a carotenoid.
How does a retrovirus prepare its genetic material for incorporation into the host cell genome?
a. Viral reverse transcriptase uses viral RNA to make double-stranded viral DNA. b. Viral reverse transcriptase uses viral single-stranded DNA to make double-stranded viral DNA. c. Viral reverse transcriptase uses viral RNA to make double-stranded viral RNA. d. Host enzymes incorporate viral RNA directly into the genome. e. Host enzymes covert viral RNA to double-stranded viral DNA.
Immunological memory results from the production of
A. memory B cells and memory cytotoxic T cells. B. mast cells and memory B cells. C. memory mast cells. D. memory B cells. E. memory cytotoxic T cells.
An example of a member of phylum Zygomycota is:
a. the common edible mushroom. b. yeast. c. the black bread mold. d. the truffle. e. a microsporidium..