| A | B |
| population | a group of individuals that are of the same species |
| duckweed | tiny root hangs in water; absorbs nutrients |
| habitat | the physical place where organisms live |
| anacharis | rooted in soil at bottom; few branches; mostly leaves |
| decomposer | breaks down large chemicals from dead organisms |
| consumer | organism that obtains energy by feeding on other organisms |
| scavenger | carnivore that feeds on dead organisms |
| food web | pattern of overlapping food chains in an ecosystem |
| food chain | series of events in which one organism eats another |
| dwarf pond lilies | bulbs take root in bottom; leaves float on surface |
| pond snails | lay eggs in gelatinous clumps |
| community | This is made up of all the different populations of organisms living in that given area |
| ecosystem | all the living and nonliving things in a given area |
| energy pyramid | diagram that shows the amt of energy that moves from onoe feeding level to another in a food web |
| damselfly | lives in water & feeds on small aquatic organisms |
| daphnia | water fleas |
| carnivore | eats only other animals |
| omnivore | eats both plants and animals |
| producer | organism that makes its own food |
| herbivore | eats only plants |