Which genera is likely the most recent ancestor of the genus Homo?
A. Ardipithecus
B. Pan
C. Sahelanthropus
D. Paranthropus
E. Australopithecus
Ans: E. Australopithecus
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Which hormone has potent, direct effects on appetite?
A. leptin B. insulin C. glucagon D. thyroxine E. vasopressin
A phenotypic technique of typing microbial strains that consists of analyzing antimicrobial susceptibility patterns of the organism of interest is:
a. biotyping. b. antibiograms. c. serotyping. d. bacteriophage typing.
Suppose after bacterial conjugation, the recipient cell contained the a and b genes. From this information, what can
you conclude?
a. The donor cell was unable to make contact with the recipient cell. b. The donor cell was F-. c. The donor cell produced an abnormal sex pilus. d. All of the genes could not fit through the sex pilus at one time. e. The sex pilus was broken before the rest of the genes could be transferred.
In their studies of "ant plants," the scientists in Investigating Life 22.5 were testing what hypothesis?
A. The tramp ants were pollinating the trees. B. The tramp ants promote fruit production in trees with the domatia. C. Other species of ants were competing with the tramp ants for nectar. D. The tramp ants were parasites eating nectar from the trees. E. Trees in good locations have enough energy to both produce food and feed ants.