Bryophytes (nonvascular plants) are a plant group characterized by lacking vascular tissues. They include the mosses, th..
This tutorial describes the sigmoid curve, annual plant growth, tree growth, human growth, and insect growth as the grow..
Cell respiration is the process of creating ATP. It is "respiration" because it utilizes oxygen. Know the different stag..
The cell is defined as the fundamental, functional unit of life. Some organisms are comprised of only one cell whereas o..
This tutorial deals with the abiotic factors of the freshwater environment that determine what sort of life would be sui..
Plants are responsible for incredible feats of molecular transformation. Plant processes, such as photosynthesis, photop..