Autotrophic nutrition and photosynthesis
Autotrophic nutrition is the mode in which organisms make their own food from carbon dioxide and water, usually using sunlight and chlorophyll.
Practice This ConceptMain explanation
Teacher explanation
In green plants, photosynthesis occurs mainly in leaves. Chlorophyll traps light energy. Carbon dioxide enters through stomata, water comes from roots, and glucose is formed. Oxygen is released as a by-product. This process is the base of food supply for most living beings.
Example
A potted plant kept in sunlight makes starch in its leaves.
Simple analogy
Green leaf, sunlight, air, and water make the plant's food factory.
Common confusion
Students often forget that sunlight and chlorophyll are both needed, not one alone.
Exam tip
In exam answers, always mention raw materials, chlorophyll, sunlight, and the product glucose or starch.
Answer writing and exam use
1-mark use
Write the exact meaning of autotrophic nutrition and photosynthesis in one clean line.
2-mark use
Define autotrophic nutrition and photosynthesis and add one example or condition.
3-mark use
Explain autotrophic nutrition and photosynthesis, show the method or example, and mention the common mistake.
Practice this concept with focused MCQs
Open the concept quiz intro first, review the test details, and then start a focused MCQ set from this concept only. Instant score and answer review are live now.
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