NEET BIOLOGY

STRUCTURAL ORGANISTION OF PLANTS AND ANIMALS

MORPHOLOGY OF FLOWERING PLANTS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Petiole when becomes green, flat and tend to function as leaf, is called as
A
Phylloclade
B
Cladode
C
Cladophyll
D
Phyllode
Explanation: 

Detailed explanation-1: -Phyllode. In some plants, the petiole becomes flattened, taking the shape of a leaf and turns green in colour. This is known as phyllode.

Detailed explanation-2: -Phyllodes are modified petioles or leaf stems, which are leaf-like in appearance and function. In some plants, these become flattened and widened, while the leaf itself becomes reduced or vanishes altogether.

Detailed explanation-3: -Thus, the correct answer is ‘Phyllode.

Detailed explanation-4: -Phyllode functions as a leaf. It is a xerophytic adaptation. Formation of phyllode is a mechanism to reduce transpiration.

Detailed explanation-5: –Phylloclades are a flattened, photosynthetic branch or stem that resembles or performs the function of a leaf.

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