NEET Biology question
The number of stomata and epidermal cells in 1 mm² leaf area of the lower epidermis of the leaves of X, Y and Z plants are given below. Arrange the plants in decreasing order of their stomatal index.
Plant / Number of Stomata (S) / Number of Epidermal Cells (E) X / 30 / 150 Y / 60 / 240 Z / 90 / 400
Answer: (B)
Solution
Stomatal index (SI) = [S/(S+E)] × 100. For X: SI = 30/(30+150) × 100 = 30/180 × 100 ≈ 16.7. For Y: SI = 60/(60+240) × 100 = 60/300 × 100 = 20.0. For Z: SI =
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