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Read Leaf Types, Arrangement and Modifications
Identify a leaf by its blade and arrangement, then distinguish normal leaves from modified petioles and leaflets.
NSEJS · Morphology of Flowering Plants · 4 linked questions · 100% coverage
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Living-system questions are solved by matching a structure or organism to its function, process and stated condition.
Structure · The part being namedFunction · What that part doesCondition · The situation that changes the answer
Study deeper: NCERT Science · Morphology of Flowering Plants
Classify leaf form and arrangement
A simple leaf has one undivided blade; a pinnately compound leaf bears leaflets along a rachis (Neem). Mustard and sunflower are alternate; guava and Calotropis are opposite. New leaves form from shoot apical meristems in an acropetal sequence.
Recognise a phyllode
In Acacia, a flattened petiole called a phyllode becomes photosynthetic. It is a petiole modification, not a leaf blade.
OlympIQ exam lens
- ✓Neem: pinnately compound.
- ✓Mustard/sunflower: alternate; guava/Calotropis: opposite.
- ✓Acacia phyllode: flattened photosynthetic petiole.
OlympIQ trap
Leaflets of a compound leaf do not each have an axillary bud.
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