Survival of the Fittest Variations

A population of rabbits lives in a forest where the color of the ground changes from brown to white during winter. Some rabbits have brown fur, while others have white fur. Which rabbit fur color is likely to be an advantage during winter?

• Brown fur

• White fur

• Both colors are equally advantageous

• Fur color does not matter

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TEKS.SCI.6.13C

A scientist observes that some fish in a lake have larger fins than others. When the water current becomes stronger, which group of fish is more likely to survive?

• Fish with smaller fins

• Fish with larger fins

• Both groups survive equally

• Fish with no fins

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TEKS.SCI.6.13C

If a disease affects only plants with thin leaves, what will likely happen to a population of plants with both thin and thick leaves?

• Only plants with thin leaves will survive

• Only plants with thick leaves will survive

• Both types will survive equally

• All plants will die

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TEKS.SCI.6.13C

A population of insects includes individuals with long legs and short legs. If the environment becomes flooded, which variation is likely to be a disadvantage?

• Long legs

• Short legs

• Both are equally disadvantaged

• Leg length does not matter

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TEKS.SCI.6.13C

A group of birds has different beak shapes. If the main food source changes from seeds to insects, which birds are more likely to survive?

• Birds with short, thick beaks

• Birds with long, thin beaks

• All birds survive equally

• Beak shape does not affect survival

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TEKS.SCI.6.13C

A population of lizards lives in a desert where the temperature is rising. Some lizards can tolerate higher temperatures. What is the likely outcome for the population?

• Only lizards that tolerate heat will survive

• All lizards will survive

• Only lizards that cannot tolerate heat will survive

• None will survive

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TEKS.SCI.6.13C

A certain type of flower can be red or yellow. If pollinators prefer red flowers, what will likely happen to the population over time?

• Yellow flowers will increase

• Red flowers will increase

• Both colors will remain equal

• All flowers will disappear

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TEKS.SCI.6.13C

A population of mice has some individuals with longer tails and some with shorter tails. If predators can easily catch mice with longer tails, what is the likely effect on the population?

• More mice will have longer tails

• More mice will have shorter tails

• Tail length will not change

• All mice will be caught

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TEKS.SCI.6.13C

A group of plants can survive with little water, while others need a lot of water. If a drought occurs, which plants are at an advantage?

• Plants needing a lot of water

• Plants that survive with little water

• Both types are equally advantaged

• All plants will die

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TEKS.SCI.6.13C

A population of beetles includes both green and brown individuals. If the environment becomes mostly brown, which beetle color is likely to be a disadvantage?

• Green

• Brown

• Both are equally disadvantaged

• Color does not matter

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TEKS.SCI.6.13C