A major point of understanding natural selection is that not all organisms in a population get to reproduce

The organism which acquired the mitochondrion could survive in anaerobic conditions and accumulate more energy consuming less the substances.

The strongest selection in most cases was not for size, but for age of maturity. Guppies under lower predation tended to mature later, and size was sometimes even negatively selected...

If a population of organisms would not react to their physical environment, this would mean that this population will be doomed to extinction to that degree, until the last generation...

Landslides and mudslides are associated with the movements of the earth, debris, ricks, and water down a slope. The speed, force, pressure, distances, and other characteristics of the landslides and...

Body size  is a phenotypic trait or adaptive trait, with a functional role in each individual organism, that is maintained and has evolved through natural selection. Selection and plasticity are two...

Population ecology is the study of these and other questions about what factors affect population and how and why a population changes over time. The study of population ecology includes...

The fundamental forces behind evolutionary change through natural selection are differences in survival and reproduction among individuals. In many species of animals and some plants differences in reproductive success can...

Kin selection is altruism that helps to increase a relative's fitness and consequently the individual's own fitness. Group selection is a process where an individual's detrimental behavior is beneficial to the population.

Natural selection can maintain balanced polymorphisms. A balanced polymorphism is one in which two or more phenotypes are maintained in fairly stable proportions over many generations. Natural selection preserves balanced...

Yes, you can. This is because every organism in the world is the product of an evolutionary process.