| A | B |
|---|
| Flows of Energy | Most important factor in an ecosystem |
| Photosynthetic organisms capture energy from ______. | the sun |
| Most life on earth depends on _____. | photosynthetic organisms |
| _____________is the rathe at which organic material is produced by photosynthetic organisms. | Primary productivity |
| What are some examples of producers? | plants, bacteria, algae |
| Organisms that eat other organisms are called _______. | consumers |
| Ecologists assign each organism to a __________ based on its source of energy. | trophic level |
| The path of energy through a trophic level is called a _______. | food chain |
| The lowest trophic level of any ecosystem is occupied by the _________. | producers |
| Primary producers are also called _________because they only eat plants. | herbivores |
| Herbivores must be able to digest ________. | cellulose |
| Humans ________ digetst cellulose. | cannot |
| Secondary consumers (meat eaters) are called __________. | carnivores |
| Animals that eat plants and other animals are called ____________. | omnivores |
| _________ are organisms that get their energy from organic waste and dead bodies. | detritivores |
| Bacteria and fungi are also called ___________because they cause decay. | decomposers |
| A complicated, interwoven group of food chains is called a _____. | food web |
| Energy is lost as ______. | heat |
| Only _________of energy makes it to the next level in a food web. | 10% |
| What limits the number of trophic levels in an ecosystem? | the amount of energy available |
