Which of the following do NOT bind to the promoter sequence during regulation?
A) activators
B) inducers
C) repressors
D) activators, inducers, and repressors
Answer: D
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The basic unit of ecology is the individual because it
A) is the basis for ecosystems. B) is the unit on which natural selection acts. C) cannot be further reduced to smaller parts. D) passes genetic information to successive individuals.
There is much controversy in the news—both scientific and popular—about the use of embryonic stem cells for research. These cells are grown as cell lines in culture, created by taking the inner cell mass from 5-day-old embryos
What is the center of the controversy? A) the fact that the embryos are mostly those unused by in vitro clinics B) the knowledge that these cell lines have reverted spinal cord injuries in mice C) the unproven usefulness of stem cells to treat human disorders D) the realization that these cells are pluripotent rather than totipotent E) the difference of opinion about whether these embryos are persons
The idea that several species in a community have functionally equivalent roles but vary in their ability to withstand environmental stressors is called the ________ hypothesis
A) redundancy B) biocapacity C) unextinction D) rivet E) multiple species
Which of the following animals is phototrophic?
A. Jellyfish B. Butterflies C. Dolphins D. Monkeys E. None of the above are phototrophic