Animals living in aquatic habitats have diversified and evolved through time. They eventually occupy ecological niches a..
Control of Growth & Development tutorials look at how the genetic makeup determines the biological processes on a da..
The circulatory system is key to the transport of vital biomolecules and nutrients throughout the body. Learn about the ..
This lesson is about the methods used for ecological research, such as quadrat and transect sampling, canopy fogging, an..
Humans are diploid creatures. This means that for every chromosome in the body, there is another one to match it. Howeve..
Lentic or still water communities can vary greatly in appearance -- from a small temporary puddle to a large lake. The s..