NEET2026BiologyChapterActual
Observe the given diagrams (P, Q, and R) showing different patterns of leaf arrangement on a stem. Identify the correct type of phyllotaxy and select the option that correctly matches them with their respective examples.
Options
- AP - Alternate (Mustard); Q - Opposite (Guava); R - Whorled (Alstonia)
- BP - Opposite (Calotropis); Q - Alternate (China rose); R - Whorled (Alstonia)
- CP - Alternate (Sunflower); Q - Whorled (Alstonia); R - Opposite (Calotropis)
- DP - Whorled (Alstonia); Q - Opposite (Guava); R - Alternate (Mustard)
Correct answer
A. P - Alternate (Mustard); Q - Opposite (Guava); R - Whorled (Alstonia)
Step-by-step solution
Phyllotaxy is the pattern of arrangement of leaves on the stem or branch. This is usually of three types: alternate, opposite, and whorled. In diagram P, a single leaf arises at each node in an alternate manner. This is alternate phyllotaxy. Examples include China rose, mustard, and sunflower plants. In diagram Q, a pair of leaves arise at each node and lie opposite to each other. This is opposite phyllotaxy. Examples include Calotropis and guava plants. In diagram R, more than two leaves arise at a node and form a