Genetic Variation Over Time Quick Check
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Question
In an ecosystem, there are two color varieties within a species of toads: brown and green. Over 50 years, the proportion of the population that is green increases from 20% to 50%. Which statement is the most likely to explain this change? (1 point)
Responses
Pollution caused a decrease in the proportion of brown toads.
Pollution caused a decrease in the proportion of brown toads.
A disease caused a decrease in the proportion of brown toads.
A disease caused a decrease in the proportion of brown toads.
The environment changed such that green toads can blend into their surroundings better.
The environment changed such that green toads can blend into their surroundings better.
The environment changed such that toads that can jump higher into the trees to survive better.
The environment changed such that toads that can jump higher into the trees to survive better.
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1 answer
The most likely explanation for the increase in the proportion of green toads in the ecosystem is:
The environment changed such that green toads can blend into their surroundings better.
This statement suggests that the green coloration of the toads provided a survival advantage, allowing them to avoid predators more effectively than the brown toads, leading to an increase in their population over time.
