Genetic Variation Video Lessons

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Problem: A population ecologist observes that the surface area of leaves in a species of dandelion growing in a desert is much smaller compared to the larger surface area of leaves of the same species growing in areas that receive greater rainfall. She gathers seeds from individual plants growing at both low and high rainfall locations, plants them in a uniform environment in a greenhouse, and measures the leaf area of the new plants. All of her experimentally grown plants grow to have similar leaf surface areas. From this she concludes that _____.a. leaf surface area is not an adaptive trait that promotes fitnessb. the variation she originally observed was due to genetic differencesc. the variation she originally observed was due to disruptive selectiond. the variation she originally observed was an example of non-genetic environmental influencee. stabilizing selection was responsible for leaf-area differences in the parent plants

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Problem Details

A population ecologist observes that the surface area of leaves in a species of dandelion growing in a desert is much smaller compared to the larger surface area of leaves of the same species growing in areas that receive greater rainfall. She gathers seeds from individual plants growing at both low and high rainfall locations, plants them in a uniform environment in a greenhouse, and measures the leaf area of the new plants. All of her experimentally grown plants grow to have similar leaf surface areas. From this she concludes that _____.

a. leaf surface area is not an adaptive trait that promotes fitness

b. the variation she originally observed was due to genetic differences

c. the variation she originally observed was due to disruptive selection

d. the variation she originally observed was an example of non-genetic environmental influence

e. stabilizing selection was responsible for leaf-area differences in the parent plants

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Genetic Variation concept. You can view video lessons to learn Genetic Variation. Or if you need more Genetic Variation practice, you can also practice Genetic Variation practice problems.

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Our tutors rated the difficulty ofA population ecologist observes that the surface area of lea...as high difficulty.

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Our expert Biology tutor, Kaitlyn took 9 minutes and 17 seconds to solve this problem. You can follow their steps in the video explanation above.