7. Given below are two statements related to photosynthesis. Examine them and answer the questions • Oxygen is present in water and carbon dioxide Oxygen is released during photosynthesis. a) Name the source from which oxygen is released. b) Name the phase of photosynthesis in which this process take places. Activate Wind
Answers
Explanation:
Most life on Earth depends on photosynthesis.The process is carried out by plants, algae, and some types of bacteria, which capture energy from sunlight to produce oxygen (O2) and chemical energy stored in glucose (a sugar). Herbivores then obtain this energy by eating plants, and carnivores obtain it by eating herbivores.
The process
During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) from the air and soil. Within the plant cell, the water is oxidized, meaning it loses electrons, while the carbon dioxide is reduced, meaning it gains electrons. This transforms the water into oxygen and the carbon dioxide into glucose. The plant then releases the oxygen back into the air, and stores energy within the glucose molecules.