Question

In an ecosystem, two color varieties within a species of toads are 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?

The environment changed such that green toads can blend into their surroundings better.
The environment has changed such that toads that can jump higher into the trees to survive better.
A disease caused a decrease in the proportion of brown toads.
Pollution caused a decrease in the proportion of brown toads.
In an ecosystem where most flowers are long and bell-shaped, there are two varieties of hummingbirds: birds with short beaks and birds with long beaks. What is the most likely hummingbird population composition?
only short-beaked hummingbirds
more short-beaked hummingbirds
only long-beaked hummingbirds
more long-beaked hummingbirds
In an ecosystem, two color varieties within a species of toads are 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?
The environment changed such that green toads can blend into their surroundings better.
The environment has changed such that toads can jump higher into the trees to survive better.
A disease caused a decrease in the proportion of brown toads.
Pollution caused a decrease in the proportion of brown toads.

Answer 1

[AI-generated answer — Bot GPT 3.5]

The environment changed such that green toads can blend into their surroundings better.