This is the role of a species in an ecosystem consisting of such things as what it eats, when it eats, and where it lives

The circles, or orbits, for electrons are called energy levels. each level can hold only a certain number of electrons. add electrons to each level until you can't add any more. how many electrons can each level hold?

Identify the terms using the following picture. principle of dominance item 1 can be described as the . item 2 can be described as the . the "p" represents from one parent.

The transport tubes for food coming down the plants are called?