Chemicals produced by an individual that influence the behavior of members of the same species are called
A) hormones. B) pheromones. C) enzymes. D) steroids. E) stimuli.
B
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Which of the following is correct about members of the genus Propionibacterium?
A. They cause acne vulgaris and contribute to the development of body odor. B. They are typically found growing on the skin and in the digestive tract of animals. C. They are used in the production of Swiss cheese. D. All of the choices are correct.
Which of the following is not true of combinatorial control of the yeast mating-type?
A. Mcm1 and ?1 combine to activate ?-specific genes in haploid ? cells. B. Mcm1 and a1 combine to repress ?-specific genes in haploid a cells. C. Mcm1 and ?2 combine to repress a-specific genes in haploid ? cells. D. Mcm1 and ?2 combine to repress a-specific genes in diploid cells.
What is thought to help explain the evolution of the blood clotting mechanism?
a. constant mutations b. direct response to environmental factors c. gene duplication d. sharing of gene pools between species e. inbreeding
Which of the following molecules is LEAST like the other three in terms of function?
A. NAD B. ATP C. FAD D. NADP