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Q.

Choose the pair of plans that have whorled phyllotaxy.

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a

China-rose and Mustard

b

Calotropis and Guava

c

Sunflower and Alstonia

d

Nerium and Alstonia

answer is D.

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Detailed Solution

Alternate phyllotaxy - one leaf is present at every node. It is the most common type of phyllotaxy. Ex: China-rose, mustard, Sun flower, families like Brassicaceae, Fabaceae, Solanaceae and Liliaceae.

Opposite phyllotaxy - Two leaves are present at every node opposite to each other. It is common in Lamiaceae, Verbanaceae Ex: Guava, Calotropis

Whorled phyllotaxy - More than two leaves are present at every node. Ex: Alstonia, Nerium

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