Autotrophs flourished, absorbing carbon and light. Soon after, primitive life forms that could assimilate oxygen thrived..
The kidneys are responsible for the regulation of water and inorganic ions. Read this tutorial to learn about the differ..
Obtaining air outside an aquatic environment required species to acquire suitable adaptations, and this was the case of ..
ATP is the energy source that is typically used by an organism in its daily activities. The name is based on its structu..
The gastrointestinal system breaks down particles of ingested food into molecular forms by enzymes through digestion and..
Bryophytes (nonvascular plants) are a plant group characterized by lacking vascular tissues. They include the mosses, th..