Species diversity refers to the measure of diversity in an ecological community. Species diversity takes into consideration species richness, which is the total number of different species in a community. It also takes into account evenness, which is the variation of abundance in individuals per species in a community.Know More
Communities with more species are considered more diverse than those with fewer. A community with less variation in the relative abundance of individuals per species is considered more even than one with more variation. Communities that are more even are also said to be more diverse. Several mathematical equations exist that incorporate evenness and abundance to measure species diversity.
The four principles of natural selection are variability among members of a species, heritability of the variable features, differences in population members' ability to reproduce and survival of the fittest in terms of variability, heritability and reproduction. Natural selection is one of evolution's four mechanisms.Full Answer >
Behavioral adaptation is the process by which an organism or a species changes its pattern of action to better suit its environment. It is contrasted with structural adaptation, which is the appearance of physical features that confer an advantage upon a species.Full Answer >
Natural selection leads to evolution because the traits of those who are able to reproduce influence future generations genetics and gradually lead to these passed on traits becoming the normal state of being, thus causing the species in question to evolve. If a group of people have predominantly brown hair genes and have children, then by way of natural selection the dominant gene will increase with future generations, meaning that slowly in time this group of people will evolve to have mostly brown hair genes.Full Answer >
Adaptation is a genetically encoded product of natural selection that enables a species to develop a functional feature that helps to ensure its survival. As a species' environment changes in time, natural selection works with a population's genetic variability to produce offspring with differing characteristics. Those offspring possessing the characteristics best suited for survival are the ones that will go on to produce similar offspring, while those less-suited to survival eventually die off.Full Answer >