Biology for IGCSE & O level - Variation And Selection (Section 7 - No. 1)
What does the example of the cane toad in Australia illustrate?
Natural selection can occur over a relatively short time.
Adaptation cannot occur quickly.
Inbreeding improves the species.
Introduced species cannot adapt.
Explanation
The cane toads changed their legs and increased distance in a short period, showing that natural selection can be relatively fast.