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Question
In Opuntia the stem is modified into a flattened green structure to perform the function of leaves (i.e., photosynthesis). Cite two other examples of modifications of plant parts for the purpose of photosynthesis.
Solution
In Australian Acasia the petiole takes the shape of the leaf and turns green to perform the function of photosynthesis.
The stem, i.e., about one internode long modifies into a leaf-like structure to carry out photosynthesis, as in Asparagus.
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