| A | B |
|---|
| omnivore | organism tht eats both plants and animals |
| niche | job of the organism; competitors have the same _________. |
| habitat | place where the organism lives |
| ecosystem | a community and its physical (abiotic) environment |
| scavengers | organisms that eat dead animals (before decomposers) |
| direct interaction | you bite the mail man |
| indirect interaction | your dog bites the mail man |
| Parasitism | a form of symbiosis in which one organism benefits and the other is harmed but not killed |
| Community | Interacting populations; consists of all organisms in a habitat |
| Biotic factor | living elements of the habitat |
| Abiotic factor | non living elements of the habitat |
| Producers | organisms with the highest populations in an ecosystem |
| Extinct | Species that is gone forever |
| Energy pyrimid | shows loss of energy from one level of food chain to the next level |
| Gross primary productivity | total amount of energy from the sun that goes through photosynthesis |
| Biocides | eliminate pests such as insects, fungus and weeds |
| DDT | insecticide |
| Perturbations | physical damages or major changes in an ecosystem |
| Biodiversity | number of different types of organisms that live on Earth |
| Species | organisms that can reproduce successfully belong to the same ________ |
