Which of the following is (are) unique to animals?
A) cells that have mitochondria
B) the structural carbohydrate, chitin
C) nervous system signal conduction and muscular movement
D) heterotrophy
E) flagellated gametes
Answer: C
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If you wished to study the SOS response in Escherichia coli, which of the following experimental procedures could be used?
A. Inactivate genes that encode DNA polymerases. B. Expose cells to ionizing radiation for 10 minutes. C. Transfer log phase cells from complete medium to thymine minimal medium. D. Expose cells to nonionizing radiation for 20 minutes. E. All of the choices are correct.
Outline the three levels of defense of humans against the invasion of pathogens
What will be an ideal response?
Exchange of genetic material in ciliates is known as
A. macronucleosis B. micronucleosis C. conjugation D. panmixis E. myxomycetosis
A potent dicot weed killer, 2,4-D, is actually a synthetic
a. phytochrome. b. gibberellin. c. auxin. d. cytokinin. e. abscisic acid.