Considering the evolution of Bacteria, the criteria used for taxonomy, and the genetic requirements for individual metabolic pathways,
explain how it is unlikely to observe three genera of the same family where one genus has strict anaerobes that degrade only small aromatics, another genus degrades large molecular weight sugars aerobically, and a third is a photoautotroph.
What will be an ideal response?
Answer: Answers will vary but should emphasize the metabolism of a common ancestor being incompatible with these physiologies. The evolution of such organisms within a taxonomic family might be expected to rarely produce such different metabolisms. The genetic requirements for these metabolisms are quite high and therefore unlikely to evolve quickly within a family.
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Which of the following best describes the anatomy of a coenocytic organism?
A. The body is made of a large cell with many nuclei. B. The body cells are organized into welldefined tissue layers. C. The body cells are organized into branching filaments. D. The body is made up of several different types of highly specialized cells. E. The body is a hollow ball of flagellated cells.
The organisms associated with patches of floating ocean vegetation would be an example of:
a. random dispersion b. aggregated distribution c. uniform dispersion d. density-dependent distribution e. clumped dispersion
What is an advantage of closed circulatory systems?
What will be an ideal response?
Is any form of adaptation coevolution?
a. Yes, evolution always happens in response to environmental change. b. Yes, other species are always part of an organism's environment. c. No, only evolution as an action–reaction response to a selection pressure imposed by interact-ing organisms on each other qualifies as coevolution. d. No, coevolution is by definition limited to mutualistic interactions.