Question

Page 2 7. In a species of non-poisonous butterfly species are avoided by predatory birds: individuals that are intermediate closely match either of the two poisonous species are readily eaten by predators. This isanampe tropical butterfly, individuals that resemble one or the other of two poisonous in appearance and do not a. directional selection b. stabilizing selection c. disruptive selection d. genetic drift e. gene flow 8. An evolutionary process that reduces among-population genetic variation genetic variation is: but increases within-population a. genetic drift b. directional selection c. inbreeding d. assortative mating e. gene flow 9. Soapberry bugs use their long beaks to penetrate the fruits of soapberry plants to gain access to the seeds. Since 1930, when a species of soapberry plant with very large fruits was introduced to south Florida, soapberry bugs there have evolved significantly longer beaks. How would the theory of evolution by natural selection best explain this observation? Soapberry bugs needed to evolve longer beaks to reach the seeds b. a. When feeding on larger fruits, soapberry bugs gradually developed longer beaks. c. Bugs with alleles for long beaks produce more offspring than short-beaked bugs Long beaks in south Florida d. e. Parents who grew longer beaks passed that acquired characteristic on to theiroffspring a plant in which flower color is determined by a single locus with two alleles CWC homozygotes are white, C"C heterozygotes are pink, and CC homozygotes are red. Your study population shows a deficiency of heterozygotes compared to expectations under Hardy-Weinberg equilibrium. One hypothesis that would explain this shortage of heterozygotes would be a. stabilizing selection b. balancing selectiorn c. large population size d. inbreeding or assortative mating e. none of the above

Answer 1

7) Disruptive selection is a process where the extreme values for a trait is favoured over intermediate selection.

8) Genetic drift is a process of change in a frequency of existing allele variant in a population due to random sampling of the organism.

9) long beaks in South Florida were favoured because they promoted the survival of the species.

10) none of the above.