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How does the presence of genetic variation contribute to the resilience and adaptation of a species in changing environmental conditions?
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- What are reproductive barriers? How do premating and postmating barriers differ?ADJUST Negative assortative mating means that organisms choose mates that are different from themselves. If negative assortive mating occurs in a population, what would expect to happen to genotype frequency over generations? O a) Frequency of the heterozygous genotype will increase. b) Frequency of the homozygous genotypes will decrease. O c) Frequency of the homozygous genotypes will increase. O d) Both A and B AUTO ||||||||| Cancel RevertWhy might captive-breeding programs that reintroduce species into natural environments fail?
- What are three biological ways in which diversity and variation arises in individuals of species? In other words, why do siblings not look exactly alike? Answer:In birds of paradise that populate tropical rainforest ecosystems, bright colored beaks and feathers are commonly found. These phenotypes continue to persist, even though brightly colored birds are more easily seen by predators. Which of the following would best describe the reason behind the persistence of these phenotypes in birds of paradise?The continued evolutionary exaggeration, across generations, of a sexual display trait (e.g., a trait used by males in attracting mates, like the peacock's tail) is most likely due to: a) stabilizing fecundity selection O b) directional sexual selection c) genetic drift d) heterozygote advantage e) directional viability selection
- What is the relationship between changes in gene frequencies and adaptations? The change in genes results in adaptations, which in turn, lead to the individual's ability to survive in its environment. The change in genes reduces adaptations, limiting the individual's ability to adapt for survival. The change in genes speeds up the process of adaptations, and the result is adaptations within any species will occur within a year. The change in genes results in adaptations in the individual, but these adaptations cannot be passed on to future generations.How does natural selection influence adaption?Which of the following is NOT considered a genetic isolating mechanism? Question 2 options: a) Seasonal isolation b) Habitat preference c) Behavioral isolation d) A, B, and C are all genetic isolating mechanisms.
- Explain how sexual selection might lead to a)sexual dimorphism and b) members of one sex (usually male) having traits that do not enhance their survivalWhy is variation amongst individuals of the same species important in ensuring species survival? How is variation generated? CYTOGENETICSWhat would a study of both monozygotictwins raised together and monozygotictwins raised apart tell you about environmentalinfluences?