Study the following statements regarding the anatomy of Isobllateral l...
In an isobilateral (equifacial) leaf, vascular bundles are conjoint and collateral. Xylem lies towards the adaxial (upper) side and phloem lies towards abxialal (lower) side of leaf.
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Study the following statements regarding the anatomy of Isobllateral l...
Understanding Isobilateral Leaf Anatomy
Isobilateral leaves possess a symmetrical structure on both surfaces, leading to specific anatomical features. Let’s evaluate the statements provided about their anatomy:
Statement Analysis
- (i) Stomata are equally distributed on both surfaces.
This is correct. In isobilateral leaves, the stomata are typically found on both the adaxial (upper) and abaxial (lower) surfaces, promoting efficient gas exchange.
- (ii) Certain adaxial epidermal cells are modified into bulliform cells in grasses.
This statement is accurate. Bulliform cells are specialized cells in the adaxial epidermis of grasses that help in the regulation of leaf folding and unfolding, aiding in water conservation.
- (iii) The vascular bundles are radial.
This statement is incorrect. In isobilateral leaves, the vascular bundles are generally arranged in a collateral manner, not radial. Radial vascular bundles are more common in roots.
- (iv) Phloem is adaxially placed.
This statement is also incorrect. In most leaves, including isobilateral types, the phloem is typically located abaxially, while xylem is adaxial.
Conclusion
Given the analysis above, the correct statements are (i) and (ii). Therefore, the correct answer is option 'A' (i and ii). This understanding is essential for NEET aspirants studying plant anatomy and physiology.
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