Across
- 3. a system of interlocking and interdependent food chains.
- 5. 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.
- 6. a plastid that contains chlorophyll and in which photosynthesis takes place
- 10. an organism that is able to form nutritional organic substances from simple inorganic substances such as carbon dioxide.
- 11. 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
- 1. a hierarchical series of organisms each dependent on the next as a source of food.
- 2. 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.
- 4. 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.
- 6. an animal that feeds on flesh.
- 7. an organism deriving its nutritional requirements from complex organic substances.
- 8. an animal that feeds on plants.
- 9. an animal or person that eats food of both plant and animal origin.
- 10. energy-carrying molecule found in the cells of all living things