In natural selection, genetic mutations that are beneficial to an individual’s survival are passed on through reproduction. This results in a new generation of organisms that are more likely to ...

Through intensive breeding, humans have pushed breeds such as pug dogs and Persian cats to evolve with very similar skulls ...

For example, the cactus finch has a long beak ... The Grants had documented natural selection in action. While beak size is clearly related to feeding strategies, it is also related to reproduction.

This helps the species to be more successful in its habitat. It’s natural selection at work. In some examples of convergent evolution, species evolve the same solution to a problem but take a ...

Note that this change was not due to pollution making the moths darker. The dark variety had always existed in small numbers, but only had a selective advantage when the selection pressure changed.

The phrase "survival of the fittest" functions principally in evolutionary theory to describe the biological concept of natural selection. English naturalist, geologist, and biologist Charles ...

For example, if heterozygotes at a locus have higher fitness than homozygotes (a scenario known as heterozygote advantage or overdominance), natural selection will maintain multiple alleles at ...

unpredictable fray of natural selection. With two partners combining varied genes, a species has more flexibility to adapt to changing environments. There are, however, rare examples of asexual ...

For example, dominant male red deer monopolize ... and that therefore do no reinforce the effects of natural selection. If females evolve a preference for a particular trait, males bearing that ...

A classic example of natural selection at work is the origin of giraffes’ long necks. The ancestors of modern giraffes were animals similar to deer or antelope, with necks of ordinary length.

The proportion of well-adapted organisms in a population can increase over the generations by the process of evolution by natural selection.