State three observations and two deductions from which Darwin derived this theory

State three observations and two deductions from which Darwin derived this theory

Observation 1; Individuals within a population have a great reproduction potential, e.g., American oyster produces 10 eggs per season.

Observation 2; The number of individual in a population remain approximately constant.

Deduction 1; Many individuals fail to survive or reproduce. There is a ‘struggle for existence’ with the population

Observation 3. Variations exists within all populations.

Deduction 2:  In the ‘struggle for existence’ those individuals showing variation best adapted to their environment have a ‘reproductive advantage’ and produce more off spring than less adapted organism.

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