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Q.

A and B are twigs with with 20 leaves each. A belongs China-rose and B to Calotropis. Then how many nodes are present in twig A and twig B respectively.

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a

20 and 10

b

10 and 20

c

20 and 20

d

10 and 10

answer is A.

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Detailed Solution

China-rose has alternate phyllotaxy i.e. every node has only one leaf. Hence twig A has 20 nodes. Twig B of Calotropis has opposite phyllotaxy with two leaves at each node. 20 leaves are present at 10 nodes.
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