Answer: favour intermediate types.
- A favour one extreme variant
- B split the population in two
- C favour intermediate types
- D increase overall variation
Correct answer: C. favour intermediate types
Explanation: Stabilising selection removes extreme phenotypes and favours intermediate (average) forms, so variation is reduced and the mean stays constant.
A simple phylogenetic tree: a common ancestor branches into several descendant lineages over time, with each branch point marking a speciation event.
Concept context
Origin of life, Darwin's theory, natural selection, speciation, and evidence for evolution.