Biology

2. primary productivity varies greatly from one ecosystem to another.
6. obtain energy by eating only plants
10. process carried out by several types of bacteria
11. all food chains begin with
13. _________ enters the ecosystem in the form of sunlight
14. obtain energy by eating other animals
15. primary productivity is the rate at which the producers in an ecosystem capture energy
16. examples of a detritivore

1. process by which green plans use the light energy from the sun to convert water and carbon dioxide into glucose and oxygen
3. each step in a food chain is called a ______ level
4. type of sugar
5. ______ forests account for 5% of the Earth's surface
6. also called consumers
7. the main energy source for life on earth
8. a _______ web links all the food chains in an ecosystem together
9. one of the factors that determine the net primary productivity
12. obtain energy by eating both plants and animals