Across
- 2. a part of the body of an animal or plant that performs a particular job
- 4. the process by which a living thing or a cell keeps the conditions inside it the same despite any changes in the conditions around it
- 6. the smallest unit of any chemical element
- 8. the simplest unit of a chemical substance, usually a group of two or more atoms
- 10. the scientific study of the natural processes of living things
- 11. all the living things in an area and the way they affect each other and the environment
- 13. a group of animals or plants that live or grow together
Down
- 1. all the living things of a particular type or group who live in a particular area or environment
- 2. a single living plant, animal, virus, etc.
- 3. the scientific study of animals, especially their structure
- 5. a large molecule, for example a protein
- 7. a group of connected cells in an animal or plant that are similar to each other, have the same purpose, and form the stated part of the animal or plant
- 9. the smallest basic unit of a plant or animal
- 12. the part of the Earth's environment where life exists