An organism suitable for studying a specific trait, disease, or phenomenon, due to its short generation time, characterized genome, or similarity to humans; examples are a fly, fish, rodent or pig, ...

Since life first sprung from the primordial ooze about 3.6 billion years ago, it has evolved a multitude of fantastical forms. Towering redwood trees soar to heights of 300 feet, while hundreds of ...

A food web is a detailed interconnecting diagram that shows the overall food relationships between organisms in a particular environment. The simplest explanation is that food webs are "who eats whom" ...