Biology for IGCSE & O level - Variation And Selection (Section 5 - No. 34)
An island was invaded by a species of bird that preyed on butterflies. In the population of butterflies, only those individuals that produced a toxic substance as a protection against predation survived. This is an example of:
artificial selection
competition
immunity
natural selection
توضیح
The environment (predatory birds) selected for butterflies with a specific trait (toxicity), which is natural selection.