The difference between an R-selected species and a K-selected species is that the R-selected species live in variable, unstable habitats, while K-selected species reside in stable environments. R-selected species produce... More »

A generalist species is one that can live in a wide variety of habitats and have a varied diet, while specialist species are adapted to a particular environment or a specific diet. Koalas and tiger salamanders are exampl... More »

Mollusks reside in many habitats around the world: most live in marine environments such as oceans and bays, while others reside in freshwater areas and even on land. Mollusks inhabit virtually every type of ecosystem on... More »

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Divergent evolution is the process of two or more related species becoming more and more dissimilar, while convergent evolution is unrelated species becoming more similar in appearance as they adapt to the same environme... More »

Microevolution is change over time that occurs within a population of a species, whereas macroevolution involves changes outside of a single species, such as a classification of species. Macroevolution involves finding g... More »

Archaebacteria, more properly called archaea, are single celled organisms that live in a wide range of habitats, including the harsh conditions of hot springs. Thermophiles are arachea which grow best at temperatures abo... More »

Fungi can live in a variety of habitats that are classified as either marine or terrestrial: in the soil, in water, and on plants and animals. Evidence suggests that some fungi have evolved closely with their partnered p... More »