What is an autotroph?
BiologyClass 10CBSEAnswered 28 May 2026
Answer
An autotroph ("self-feeder") produces its own food from simple inorganic substances using an external energy source.
- Photoautotrophs: Use sunlight (plants, algae, cyanobacteria — via photosynthesis).
- Chemoautotrophs: Use chemical energy (certain deep-sea bacteria).
- Form the base of every food chain.
Photosynthesis equation: 6CO₂ + 6H₂O + light → C₆H₁₂O₆ + 6O₂
Autotrophs make their own food from inorganic substances, forming the essential foundation of all food chains.
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