Tuesday, September 25, 2007

Exercises 4,5,6page 252

4) in an urban ecosystem the humans controll it alot more, we farm our food and have water stored for us but in a natural ecosystem the animals have no control over what happens and have to find food and water for themselves. and they have to protect them selves from other animals.
5)some plants might grow better in higher temp
eratures and cause them to overbreed or even out breen the plants whic dont do very well in heat.
6) the amount of insects decreased when alot of trees and bushes were planted because there is more room for animals to come and live in this ecosystem. The insects being at the bottom of the food chain are now being eaten by all the new predators like birds.

ROSS & JACOB

No comments: