Across |
1. | An organism that can make organic molecules from inorganic molecules; a photosynthetic or chemosynthetic autotroph that serves as the basic food source in an ecosystem. |
4. | A community of organisms and their abiotic environment. |
5. | A large region characterized by a specific type of climate and certain types of plant and animal communities. |
7. | An organism that eats other organisms or organic matter instead of producing its own nutrients or obtaining nutrients from inorganic sources.d |
8. | The extent to which or the limits beetween which variation is possible. |
10. | The place where an organism usually lives. |
11. | Third in order or level. |
14. | An organism that feeds by breaking down organic matter from dead organisms, examples include bacteria and fungi. |
17. | Study of the interactions of living organisms with one another and with their environment |
18. | The part of the Earth where life exists. |
19. | An environmental factor that is associated with or results from the activities of living organisms. |
20. | Group of organisms of the same species that live in a specific geographical area and interbreed. |