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Question
Students were on an excursion to a botanical garden. They noted the following observation. Will you be able to help them in understanding those conditions?
There was a green plant with flat stem, but no leaves. The entire plant was covered by soft spines.
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Solution
Student must have observed phylloclade, which is a modification of stem.
Phylloclade:
- Modification of stem into leaf like photosynthetic organ is known as phylloclade.
- Being stem it possesses nodes and internodes.
- It is thick, fleshy and succulent, contains mucilage for retaining water e.g. Opuntia, Casuarina (Cylindrical shaped phylloclade) and Muehlenbeckia (ribbon like phylloclade).
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