In Opuntia, the stem is modified into

Cladode

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Phylloclade

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Phyllode

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Staminode

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Solution

The correct option is C Phylloclade
The meanings of the following stem modifications are:
-Phylloclade: It is a green photosynthetic flattened or rounded succulent stem with leaves either feebly developed or modified into spines. Ex- Opuntia, Casuriana, Euphorbia and Cactus.
-Cladode: Phylloclade usually having one or two internodes long and succulent is called as cladode. Ex- Asparagus and Ruscus.
-Phyllode: In this, the petiole becomes flattened and functions as a normal leaf. Ex- Australian acacia.
-Staminode: When stamens are without pollen grains and remain sterile throughout their life. Ex- Salvia.
So, the correct answer is 'Option B- Phylloclade'.

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