The following diagram demonstrates a physiological process taking place in green plants (a funnel and test tube inverted over Hydrilla in a beaker of water). The whole set up was placed in bright sunlight for several hours. Study the diagram and answer the questions that follow: The following diagram demonstrates a physiological process taking place in green plants (a funnel and test tube inverted over Hydrilla in a beaker of water). The whole set up was placed in bright sunlight for several hours. Study the diagram and answer the questions that follow:
Explain the physiological process mentioned in (i) above.
Topic: Photosynthesis
Answer
PHOTOSYNTHESIS is the process by which living plant cells containing CHLOROPHYLL produce food substances — glucose and starch — from CARBON DIOXIDE and WATER, using LIGHT ENERGY. OXYGEN is released as a by-product.
A complete answer needs FIVE elements, each a place where a mark can be lost: GREEN cells containing CHLOROPHYLL, the raw materials CARBON DIOXIDE and WATER, the energy source LIGHT, the product GLUCOSE, and the by-product OXYGEN.
Candidates most often omit WATER, or say "plants" without "green".
The word itself summarises it: PHOTO (light) + SYNTHESIS (building up) — building food using light.