Answer: Miller-Urey experiment.
- A Pasteur experiment
- B Miller-Urey experiment
- C Mendel experiment
- D Meselson-Stahl experiment
Correct answer: B. Miller-Urey experiment
Explanation: Miller-Urey experiment (1953): Stanley Miller and Harold Urey simulated early Earth conditions (NH<sub>3</sub>, CH<sub>4</sub>, H<sub>2</sub>O, H<sub>2</sub> + electrical sparks) and produced amino acids. This supported the idea that organic molecules could form abiotically.
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.