Which of the following are main tenets of Darwin's theory of natural selection?

Individuals most adapted to their environments have a better chance of surviving to reproduce.
Individuals can produce more offspring than can survive.
Individuals compete for resources.
The traits within a population vary and are heritable.
Traits acquired during an individual's lifetime are heritable.

(i) Individuals most adapted to their environments have a better chance of surviving to reproduce.

(ii) Individuals compete for resources.

(iii) The traits within a population vary and are heritable.

Explanation:

Adaptation was an important aspect of Darwin's theory, so the first statement must be true. The traits within a population vary which leads to natural selection, so the second-last statement is also true. Resources are limited and therefore, competition is abundant, and this, the 3rd option is also true.

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