Natural Selection and Fitness

Black rabbits (BB) and white rabbits (bb) are both able to survive because they can camouflage into the white and black rocks in their environment. However, the intermediate gray rabbits (Bb) do not survive. This results in only white and black rabbits.

• Stabilizing

• Directional

• Disruptive

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Small lizards have difficulty defending territories so they end up dying out. Large lizards are more likely to be preyed upon by owls. Over time, only medium sized lizards end up surviving.

• Stabilizing

• Directional

• Disruptional

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Why do peppered moths tend to be the same color as the trees on which they live?

• The coloring goes along with tasting like the tree. 

• It keeps the moth the same temperature as the tree. 

• It makes the moths faster than the birds

• It makes the moths harder to see.

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Why is the mouse population changing over time?

• The light mice can reproduce more successfully than the dark mice

• The hawks eat more dark mice than light mice because the dark mice taste better

• The hawks eat more light mice than dark mice because they can see the light mice more easily

• The hawks eat more dark mice than light mice because they can see the dark mice more easily

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According to natural selection, light colored tree trunks would favor

• light colored moths

• dark colored moths

• red colored moths

• red and light colored moths

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There is a species of beetle that has two variations in the population: brown beetles and green beetles. About 82% of all brown beetles survive to adulthood while only 31% of green beetles survive to adulthood. Which of the following statements is true about the fitness of these beetles?

• The green beetles have higher fitness

• The brown beetles have higher fitness

• The green beetles have more adaptations

• The brown and green beetles have the same level of fitness

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NGSS.MS-LS4-4

Why did the population of peppered moths in England change from light to dark after the Industrial Revolution?

• Light moths were easy to see against sooty trees and were eaten

• Light moths were killed by soot

• The birds that ate the dark moths were killed by soot

• Dark moths were produced by industrial processes

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If an organism can't adapt fast enough, this might happen.

• hibernate

• stay the same

• live longer

• become extinct

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What can happen to a species over time if some of the organisms have an advantage?

• The population will decrease

• The population will become extinct

• The population will slowly increase

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Survival of the Fittest and Evolution were proposed by what scientist?

• Charles Darwin

• Albert Einstein

• Steven Hawking

• Isaac Newton

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