Q16 / 180 · NEET 2013 (Karnataka) · Botany
How many plants among China rose, Ocimum, sunflower, mustard, Alstonia, guava, Calotropis and Nerium (oleander) have opposite phyllotaxy?
- Correct answerAThree
- BFour
- CFive
- DTwo
Solution
Ocimun, guava and Calotropis have opposite phyllotaxy, while china rose, sunflower, grass, mustard shows alternate phyllotaxy and Alstonia, hydrilla, Nerium (Oleander) shows whorled phyllotaxy.
Related Theory
The three types of phyllotaxy are as follows:
l. Alternate type of phyllotaxy: A single leaf arises at each node in an alternate manner.
2. Opposite type of phyllotaxy: A pair of leaves arise at each node and lie opposite to each other.
3. Whorled type of phyllotaxy: More than two leaves arise at a node and form $a$ whorl.


Hence, the correct answer is option: 'A'.