Answer: evolution.
- A evolution
- B respiration
- C digestion
- D circulation
Correct answer: A. evolution
Explanation: Evolution is the change in inherited traits of populations over time.
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.