6. Fungus is an organism not drawn in the above
food chain although it has a very important
role. Describe an important role of organisms
such as fungi and bhacteria:

Asquirrel population lives in an area. over many years, a river in that area grows wider and stronger, eventually forming a canyon. the squirrel populations on the two sides of the canyon can no longer mate with each other and ultimately form distinct species. this is an example of