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Question

Leaves are changed into spines in xerophytic structures called _______.

A
Phyllode
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B
Cladode
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C
Phylloclade
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D
All of the above
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Solution

The correct option is C Phylloclade

A modified stem that is flattened and capable of unlimited growth is called as phylloclade. It carries out photosynthesis. It is a xerophytic adaptation. Leaves are changed into spines in xerophytic structures called phylloclade. Examples include Opuntia. Opuntia is a xerophytic plant, in which leaves are modified into spine to reduce the rate of respiration. A modified stem capable of limited growth is called as cladode. It carries out photosynthesis. Examples include Ruscus, Asparagus species. Phyllode is a petiole modified into a leaf-like structure. Thus, the correct answer is 'Phylloclade.'


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