After a storm, water runs off from place like lawns, streets and parking lots. the water carries any chemicals and contaminants that are present there, including oil. how might these sentences be furter combined?

Explain the importance of producers, primary consumers, secondary consumers and decomposers in an ecosystem.

1. in what ways have non-native species been beneficial? 2. what are some of the hypotheses for the collapse of honeybee colonies? 3. distinguish between regional and functional extinction. 4. why is it difficult to measure background extinction rates? 5. what three factors are most important in causing extinction rates to climb?

If the temperature in an area drops five degrees between one day and the next, has the climate of the area changed? explain.