7.2.1 Decant with modification: Darwin

LaMark → 用进废退，获得性遗传

Darwin’s Finch达尔文地雀

7.2.2 Natural selection brings about adaptations & increases fitness

Observation: 1. Variation 2. Reproduction → time, compete

Unsettled by Darwin: 1. Origin of life 2. Nature of inheritance

Natural selection increases adaptation

Fitness 适合度

Speciation 物种形成

7.2.3 Sex selection

Sex selection = Mating selection

1. Intrasexual Selection 同性竞争
2. Intersexual Selection 异性选择

7.2.4 Artificial Selection

eg. pet dogs