All other trait values are under negative selection. How are humans contributing to negative selection? It's a part of evolution that can also drive some species to extinction; models of negative ...

Each species eats a different type of food and has unique characteristics ... The Grants had documented natural selection in action. While beak size is clearly related to feeding strategies ...

The struggle is mainly about food -- different types of seeds -- and the availability of that food is dramatically influenced by year-to-year weather changes. Natural selection at its most ...

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

The phrase "survival of the fittest" functions principally in evolutionary theory to describe the biological concept of natural selection ... capabilities. Different types of adaptations include ...

helsinki.fi Objectives—To investigate the associations between natural selection to sports at a young age ... male athletes participating at a young age (1920–1965) in different types of sport ...