Question

Darwin proposed that, for natural selection to occur, there must be four conditions present. What are they? How does each contribute to natural selection?

Answer 1

The four conditions are

1.reproduction

Reproduction contribute to natural selection when one individual which survive more produces more offspring .not all individuals get to reproduce to their full potential.

2.heredity

Heredity is the condition necessary for the evolution to occur when the traits of the fittest are inherited by the successful offspring.

3.variation in fitness of organisms.

Individuals in the population with some characteristics might be more likely to reproduce and be more fit .so depending upon the variation in fitness of organisms the natural selection occur.e g green beetles are eaten by birds and survive less and brown beetles survive more

4.variation in individuals character among the members of population.:e.g some beetles are green and some are brown.