Certain species are capable of expressing characteristics indicative of the state of the ecosystem they occupy. They are..
The gastrointestinal system breaks down particles of ingested food into molecular forms by enzymes through digestion and..
If the balance of nature is left untouched, landscapes can change dramatically over time. A previous ecosystem is supers..
Lotic communities have conditions that are rather harsh for typical plants. Thus, the diversity of plant species in loti..
Dinosaurs represented a major turn in the evolutionary development of organisms on Earth. The first dinosaurs were presu..
Geological periods is a study guide that cites the different geological periods on Earth's timeline. Each has a brief ov..