Ecology

8. Two different species cannot occupy the same niche in the same place for very long.
10. consume detritus
12. represents a single pathway through which energy and matter flow through an ecosystem.
13. the study of how living things interact with each other and with their environment. It is a major branch of biology, but has areas of overlap with geography, geology, climatology, and other sciences.
14. break down the remains and other wastes and release simple inorganic molecules back to the environment.
16. use energy from sunlight to make food by photosynthesis. They include plants, algae, and certain bacteria.
20. factor the living aspects of the environment. They consist of other organisms, including members of the same and different species.

1. use energy from chemical compounds to make food by chemosynthesis. They include some bacteria and also archaea. Archaea are microorganisms that resemble bacteria.
2. the total mass of organisms at a trophic level.
3. the nonliving aspects of the environment. They include factors such as sunlight, soil, temperature, and water.
4. the role of a species in its ecosystem. It includes all the ways that the species interacts with the biotic and abiotic factors of the environment.
5. multiple pathways through which energy and matter flow through an ecosystem.
6. the dead leaves, animal feces, and other organic debris that collects on the soil or at the bottom of a body of water.
7. consume the soft tissues of dead animals.
9. consume animals. Examples include lions, polar bears, hawks, frogs, salmon, and spiders.
11. are the final step in decomposition. They feed on any remaining organic matter that is left after other decomposers do their work
15. The feeding positions in a food chain or web.
17. the physical environment in which a species lives and to which it is adapted.
18. consume both plants and animals. They include humans, pigs, brown bears, gulls, crows, and some species of fish.
19. onsume producers such as plants or algae. They are a necessary link between producers and other consumers. Examples include deer, rabbits, and mice.