The group of organisms that is NOT comprised of eukaryotic cells is
A. Fungi.
B. Animalia.
C. Plantae.
D. Archaea.
D. Archaea.
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Which of the following does (do) not always require the presence of living bacteria?
A. Food poisoning B. Bacterial diarrhea C. Intoxications D. All of the choices are correct.
The bleaching of a coral reef may be due to
a. exposure to chemicals. b. human activities. c. temperature changes. d. all of these
Compared to other mammals, the human brain is unique with respect to its ____
a. integrative capacity only b. degree of complexity only c. pathway of embryonic development only d. integrative capacity and degree of complexity e. integrative capacity, degree of complexity, and pathway of embryonic development
You study a population that is polymorphic for sexual/asexual reproduction. A sexually transmitted disease has just decimated most of the sexually reproducing individuals
When you expose samples of asexuals and sexuals from this population to harsh envi-ronmental conditions in the lab, you discover, to your surprise, that the sexuals were worse at adapting to the new environment than the asexuals. (Note that your lab pop-ulation is free from the sexually transmitted disease.) What are likely explanations for your results? a. All asexually reproducing strains independently acquired the same benefi-cial mutation that offset the advantage of the sexuals. b. The bottleneck caused by the disease resulted in the fixation of many alleles in the sexually reproducing population. c. Asexuals are favored under harsh environmental conditions. d. There is no surprise here; this is what standard evolutionary theory pre-dicts. e. B and C.