Across
- 1. the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct
- 3. an organism that can produce its own food using light, water, carbon dioxide, or other chemicals
- 4. an animal that feeds on flesh.
- 6. (in green plant cells) a plastid that contains chlorophyll and in which photosynthesis takes place.
- 9. a process in living organisms involving the production of energy, typically with the intake of oxygen and the release of carbon dioxide from the oxidation of complex organic substances.
- 12. an organelle found in large numbers in most cells, in which the biochemical processes of respiration and energy production occur. It has a double membrane, the inner layer being folded inward to form layers (cristae).
Down
- 2. an animal that feeds on plants
- 5. an organism deriving its nutritional requirements from complex organic substances.
- 6. a green pigment, present in all green plants and in cyanobacteria, responsible for the absorption of light to provide energy for photosynthesis. Its molecule contains a magnesium atom held in a porphyrin ring.
- 7. the source of energy for use and storage at the cellular level.
- 8. a hierarchical series of organisms each dependent on the next as a source of food.
- 10. an animal or person that eats food of both plant and animal origin.
- 11. a system of interlocking and interdependent food chains