Final answer:
The statement 'photosynthesis is an example of a closed system' is not true about photosynthesis; photosynthesis is an open system as it involves the exchange of matter and energy with the environment.
Step-by-step explanation:
The statement that is not true about photosynthesis is that 'photosynthesis is an example of a closed system.' This is incorrect because photosynthesis is considered an open system, as it exchanges energy and matter with its surroundings, particularly when carbon dioxide and water are taken in and oxygen and glucose are released into the environment.
Understanding Photosynthesis:
Photosynthesis is a fundamental biological process that occurs in plants and other photosynthetic organisms. Through this process, plants convert solar energy, carbon dioxide (CO2), and water (H2O) into glucose (C6H12O6), a form of carbohydrates that serves as a crucial energy source for the plant, and oxygen (O2), which is released as a byproduct.
Photosynthesis occurs in two main stages: the light-dependent reactions and the Calvin Cycle. In the light-dependent reactions, which take place in the thylakoid membranes of chloroplasts, sunlight is absorbed and used to split water molecules, releasing O2 into the atmosphere and generating ATP and NADPH. These energy carriers are then used in the Calvin Cycle, the second stage of photosynthesis, which takes place in the stroma of chloroplasts. During this stage, CO2 is fixed into glucose through a series of reactions driven by the ATP and NADPH produced in the light-dependent reactions.