Q.

In Opuntia, the modified stem is

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a

flat, green, non-fleshy and has spines at every node.

b

cylindrical, fleshy, green and with spines.

c

flat, fleshy, green and with spines at every node.

d

cylindrical, fleshy, green and with scale leaves at every node.

answer is C.

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Detailed Solution

In Opuntia which is commonly known as prickly pear and belongs to Cactaceae, the modified stem is phylloclade which is flat, fleshy and has cluster of spines at every node. This modified stem is meant for carrying out photosynthesis and minimising transpiration.

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