Biology

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Darwin was able to formulate his theory of evolution based on several facts. Which of the following facts was unavailable to Darwin in the mid-nineteenth century?

Natural resources are limited.

Individual organisms in a population are not alike.

Characteristics are inherited as genes on chromosomes.

Most populations are stable in size.

All populations have the potential to increase.


I was thinking that it was "Characteristics are inherited as genes on chromosomes."

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