when will natural selction occur
A. When there is competition
B. When there are unlimited resources
C. When there are no mutations in a species
D. When the population is very small
Natural selection will occur When there is competition.
Competition between living things is considered in Darwin's theory of the mechanism of evolution as a key component of the "fight for existence" and, consequently, as the foundation for natural selection.
Members of the same species compete with one another within their own species. In the same location, for instance, two male birds of the same species can compete for mates.
A fundamental element of natural selection is this kind of rivalry. It encourages a species' ability to evolve superior adaptations throughout time.
The reduction of niche overlap when two species compete for the same finite resource may result in evolutionary changes in both species.
Alternately, the competitively dominant species remains the same and may even be able to enlarge its niche, which limits the amount of available niche space.
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