Define the term fitness and relate it to the meaning of selection coefficient
What will be an ideal response?
Fitness is a measure of the proportion of offspring that a particular phenotype will contribute to the next generation; the selection coefficient is the mathematical difference between the actual fitness of a given genotype and the optimal fitness for an individual in a given population.
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Which of the following represents a sequence located upstream, downstream, within the coding region, or several thousand base pairs away from a gene that increases transcription?
a. promoter b. terminator c. repressor d. enhancer
Producers fix carbon from ____ through the process of ____
a. carbon dioxide; metabolism b. carbon dioxide; cellular respiration c. carbon dioxide; photosynthesis d. oxygen; photosynthesis e. oxygen; cellular respiration
In which of the following groups of organisms are most species iteroparous?
A) annual plants B) perennial plants C) periodical cicadas D) salmon
Although prion infectious agents are more closely related to viruses than any other kind of infectious agents, there are still some major differences between the two. Which statement describes a major difference?
A. Viral infections can always be treated and cured, whereas prion diseases cannot. B. Viruses can be transmitted by animal to human or human to human, but prions are always human to human transmission. C. Prions are not destroyed by heat, but viruses can be inactivated by heat. D. Viruses do not contain protein, whereas prions do.