How many plants among China rose, Ocimum, sunflower, mustard, Alstonia, guava, Calotropis and Nerium (oleander) have opposite phyllotaxy?
- Three
- Four
- Five
- Two
Answer
(1) Three
Solution
As per NCERT, in opposite phyllotaxy a pair of leaves arises at each node and lie opposite each other, as in Calotropis and guava.
Thus Ocimum (tulsi), guava and Calotropis have opposite leaves, whereas China rose, sunflower and mustard have alternate leaves and Alstonia and Nerium have whorled leaves.
∴ Number of plants with opposite phyllotaxy = 3.
Answer: (1)