Answer: fossils.
- A fossils
- B living cells
- C isolated genes
- D fresh tissues
Correct answer: A. fossils
Explanation: Fossils provide direct evidence of past life and evolution.
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.