Which organelle deals with the reproduction of the protist?
A. Macronucleus
B. Contractile Vacuole
C. Oral Groove
D. Micronucleus
Ans: D. Micronucleus
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Compounds that kill the cell are said to be:
A. cytotoxic. B. genotoxic. C. mutagenic. D. carcinogenic. E. auxotrophic.
Female secondary sexual traits, such as functional breasts and fat deposits around the hips and thighs, are determined
by _____.
a. the presence of the master gene, SRY b. increased concentration of gene products from the two X chromosomes c. absence of gene products from the Y chromosome d. sex hormones e. maternal influence
During the “gap” phases of the cell cycle, most of
the activity is directed toward a. DNA replication. b. nuclear membrane synthesis. c. resting for the next step. d. sorting the chromosomes. e. growing and synthesizing proteins
Which of the following groups had made their appearance during the Ordovician period?
A. jawed fish and amphibians B. jawless and jawed fish C. amphibians and reptiles D. reptiles and mammals E. All of these groups had appeared by the Ordovician period.