Answer: directional selection.
- A stabilising selection
- B disruptive selection
- C directional selection
- D artificial selection
Correct answer: C. directional selection
Explanation: Directional selection favours one extreme phenotype, shifting the mean of the population in that direction over generations.
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.