Multiple choice

Opuntia is an example of __________.

  1. Phylloclade

  2. Cladodes and Cladophylls

  3. Bulbil

  4. Stem Thorn

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A Correct answer
Explanation

A phylloclade is a flattened stem of several internodes functioning as a leaf. In Opuntia the stem is modified into a green flattened structure called Phylloclade. On the surface of the phylloclade, clusters of spines are formed. These spines are the modified leaves of the auxilliary bud. These spines not only check the rate of transpiration but also protect the plant from herbivores. The phylloclade has distinct nodes and internodes. E.g., Opuntia.

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