Science — AI-generated practice question

| Autotrophic Nutrition | Heterotrophic Nutrition |
|---|---|
| Organisms prepare their own food using simple inorganic substances (CO₂ and water). | Organisms depend on complex food prepared by other organisms. |
| External energy source (sunlight) and chlorophyll are required. | Enzymes are used to break down complex food into simpler substances. |
| Examples: green plants, some bacteria. | Examples: animals, fungi. |

Autotrophic nutrition involves intake of simple inorganic materials and synthesis of complex organic food. Heterotrophic nutrition involves intake of ready-made complex material, which is then broken down for use.

Source: Life Processes, Chapter 5, Section 5.2

• Examiners expect a comparison format — either a table or parallel points. A table is ideal here.
• Three clear points of difference earn full 3 marks (1 mark each).
• Key terms to include: inorganic sources, CO₂, water, sunlight, chlorophyll (autotrophic) vs. complex substances, enzymes, depend on autotrophs (heterotrophic).
• Always give one example for each type — it reinforces the answer without adding unnecessary length.