Trilobites were animals that lived in the ocean between 520 million and 540 million years ago. A trilobite fossil can
be used as an index fossil

An example of what is geese flying south for the

Match the types of competition to their descriptions.

For each of the following, decide whether the statement describes photosynthesis, cellular respiration, or both. releases energy in the form of atp. stores energy in glucose molecules. performed by producers. performed by consumers.