Which of the following is unlikely to contribute to natural selection Mutations of the somatic cells Mutations of the reproductive cells Natural disaster Infectious disease in the population
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Which of the following is unlikely to contribute to natural selection
Mutations of the somatic cells
Mutations of the reproductive cells
Natural disaster
Infectious disease in the population
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- Entomologists at the New York State Department of Agriculture are interested in determiningthe connection between pest insects infesting crop plants with populations of the same insectinfesting native plants in natural habitats. Long term trapping and monitoring studies haveestimated that on average 3% of the populations move between habitats (farm to natural and visversa) each generation. A new insecticide resistance allele (∆K) has begun to increase infrequency in the agricultural populations. A genotyping survey at this locus of 50 individuals ineach population has revealed the following genotype counts: K/K K/∆K ∆K/∆K Agricultural field 32 16 2 Forest 48 2 0 4a. Based on the effects of migration alone, what will the frequency of ∆K be in the forestpopulation in the next generation? 4b. If migration was acting in here without selection, what would the frequency of ΔK be in theagricultural population in the next generation? 4c. If the natural forest population was…DOTa species The pesticide DDT was widely used in the 1940s as a method of insect control. In the late 1950s the first DDT-resistant mosquitoes were discovered, and eventually DDT-resistant mosquitoes were found globally. When DDT is used now, the development of DDT resistance in mosquito populations occurs in months rather than years.Which of the following best explains the observations concerning DDT resistance in mosquitoes? * The proportion of DDT-resistant mosquitoes in a population remains constant due to the metabolic costs of DDT utilization DDT is a chemical signal that delays normal reproductive cycles in many mosquito populations. Natural selection favors DDT-resistant mosquitoes that are already present in a population when DDT exposure occurs. Competition for limited resources causes mosquitoes to migrate to geographical areas that have richer supplies of DDT. A population of 1,492 finches is introduced to a rainforest. Over the next year, the finches showa death rate of…a description of the 2 different types of sexual selection
- Which of the following set of characteristics would best described a K-selected species (e.g. an elephant)? early reproduction with many, small offspring and short-lived early reproduction with few, large offspring and short-lived late reproduction with few, large offspring and long-lived O late reproduction with many, small offspring and long-livedThe pesticide DDT was widely used in the 1940s as a method of insect control. In the late 1950s the first DDT-resistant mosquitoes were discovered, and eventually DDT-resistant mosquitoes were found globally. When DDT is used now, the development of DDT resistance in mosquito populations occurs in months rather than years.Which of the following best explains the observations concerning DDT resistance in mosquitoes?* nd 2 chool The proportion of DDT-resistant mosquitoes in a population remains constant due to O the metabolic costs of DDT utilization DDT is a chemical signal that delays normal reproductive cycles in many mosquito populations. Natural selection favors DDT-resistant mosquitoes that are already present in a population when DDT exposure occurs. Competition for limited resources causes mosquitoes to migrate to geographical areas that have richer supplies of DDT. A population of 1.492 finches is intróduced to a rainforest. Over the next year, the finches show a death rate of…Which of the following statements about the breast cancer-causing BRCA1 allele is false? O It has evolved under strong negative selection in humans O Possession of the allele results in a greater than 50% chance of developing breast cancer O The dN/ds >1 O One likely hypothesis for its presence is that also is important in combating viral infections Ne
- The wing polymorphic oricket, Grylus deaensis, has some individuals who are capable of long flights fong legs, trong fight muscles) and olhers who are not (short legs, weak tight muscles) Fight-capable orioeta have delayed reproduction, with lower ovarian function in females and less courtahip song production in males A biologist genotypes a population of orickats ving in an urtan feld in Dalas at the wing gene, which has two aleles, W and w Crickets with at least one oopy of the Watele are fight capable, while ww homarygoles are fight-incapable. She finds 12 crickets with genotype WW. 35 with genotype Ww and 63 with genotype ww. Keep these numbers for the next two questiona What is the frequency of the W allele?which of thee following statement is false 1) the antagonistic pleiotropy hypothesis is used to explain why evolving to live longer is often beneficial to oneâ s fitness 2)Ribozyme is class of molecule that is made of RNAs (thus "ribo" in its name) and amino acids (thus "zyme" in its name). 3)In human population, males are in general larger than females. This observation can be seen as an example of sexual dimorphism.180- 170- Figure 1. For each of more than 200 human societies, the average height of the men is plotted against the average height of the women. The diagonal line shows where the points would fall if men and women were of equal height. From Rogers and Mukherjee (1992). 160- 150- 140- 140 150 160 170 180 Female stature (cm) tionry ysin.e 2. Using an evolutionary approach, explain the evolution of sexual dimorphism in height among men and women, Is this difference due to natural or sexual selection? How do know? you Male stature (cm)
- Which of the following are sources of variation in a population? Sexual reproduction Sexual selection Mutation O Natural selectionSo called blue/white colony selection is a form of positive selection, within this system which of the following is true? Only cells that don't have your cloned fragment survive selection. None of the provided answers are true. Only cells that have your cloned fragment survive selection. Multiple cells survive on the plate and additional screening is need to select those that contain your cloned fragment.The pesticide DDT was widely used in the 1940s as a method of insect control. In the late 1950s the first DDT-resistant mosquitoes were discovered, and eventually DDT-resistant mosquitoes were found globally. When DDT is used now, the development of DDT resistance in mosquito populations occurs in months rather than years.Which of the following best explains the observations concerning DDT resistance in mosquitoes? * nd 2 school The proportion of DDT-resistant mosquitoes in a population remains constant due to the metabolic costs of DDT utilization DDT is a chemical signal that delays normal reproductive cycles in many mosquito populations. Natural selection favors DDT-resistant mosquitoes that are already present in a population when DDT exposure occurs. Competition for limited resources causes mosquitoes to migrate to geographical areas that have richer supplies of DDT. A population of 1.492 finches is introduced to a rainforest. Over the next year, the finches showa death rate of…