Natural Selection - Mayr

Analysis by Ernst Mayr

Observation 1 : Populations can reproduce exponentially.

Observation 2 : Populations tend to remain constant.

Observation 3 : Natural resources are limited.

Inference 1: Individuals compete for resources and only a few survive.

Observation 4 : Traits of individuals vary.

Observation 5 : Much of the variations are heritable.

Inference 2: Some traits will give an individual advantages for survival.

Inference 3: Those individuals will likely have more offspring.

Inference 4: Characteristics of the population will change over time as natural selection favors some traits.

Concerning Natural Selection