Organisms can be classified based on how they obtain food. Autotrophs make their own food, while Heterotrophs depend on other organisms.
Autotrophs (plants) and Heterotrophs (animals)
Autotrophs
Autotrophs are organisms that make their own food using sunlight, water, and carbon dioxide. Example: Green plants, some bacteria. Photosynthesis: Sunlight + Water + CO₂ → Glucose + Oxygen
Photosynthesis in plants
Heterotrophs
Heterotrophs cannot make their own food and depend on other organisms. Types include:
- Herbivores: Eat plants (cow, rabbit)
- Carnivores: Eat animals (lion, tiger)
- Omnivores: Eat both plants & animals (human, bear)
- Parasites: Live on other organisms (tapeworm, leech)
Comparison
Autotrophs make their own food while heterotrophs rely on other organisms. Here’s a quick comparison:
Autotrophs vs Heterotrophs