Question:
Out of the following statements, which one is not correct ?
Out of the following statements, which one is not correct ?
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In biology, any absolute statement asserting that a complex morphological trait like stomatal distribution is "the same in every plant" is almost always incorrect due to the high diversity and adaptation of plant species.
Updated On: Aug 5, 2026
- Number of stomata found in all different leaves is different in plants
- Distribution of stomata is different in different plants
- Distribution, number, size and type of stomata are same in every plant
- Size and type of stomata is different in different plants
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The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept:
Stomata are microscopic pores found on the epidermis of leaves, stems, and other plant organs.
They facilitate gas exchange (\(CO_2\) and \(O_2\)) for photosynthesis and respiration, as well as the loss of water vapour through transpiration.
Step 2: Detailed Explanation:
Let us analyze the variability of stomata across the plant kingdom:
- Statement A: "Number of stomata found in all different leaves is different in plants."
This is correct.
The absolute number of stomata can vary significantly between leaves on the same plant depending on age, light exposure, and position on the canopy.
- Statement B: "Distribution of stomata is different in different plants."
This is correct.
Stomatal distribution varies by species and habitat. For example, monocot leaves typically have stomata on both surfaces (amphistomatic), while dicot leaves often have stomata primarily on the lower surface (hypostomatic) to reduce water loss.
- Statement C: "Distribution, number, size and type of stomata are same in every plant."
This statement is incorrect.
Stomatal traits show high evolutionary diversity and vary significantly between species.
For example, xerophytic plants have fewer, sunken stomata to conserve water, whereas hydrophytic plants may have stomata only on the upper surface of floating leaves.
- Statement D: "Size and type of stomata is different in different plants."
This is correct.
Stomatal size and types (such as anomocytic, anisocytic, paracytic, or diacytic) differ based on the taxonomic classification of the plant.
Step 3: Final Answer:
The correct option is (C).
Stomata are microscopic pores found on the epidermis of leaves, stems, and other plant organs.
They facilitate gas exchange (\(CO_2\) and \(O_2\)) for photosynthesis and respiration, as well as the loss of water vapour through transpiration.
Step 2: Detailed Explanation:
Let us analyze the variability of stomata across the plant kingdom:
- Statement A: "Number of stomata found in all different leaves is different in plants."
This is correct.
The absolute number of stomata can vary significantly between leaves on the same plant depending on age, light exposure, and position on the canopy.
- Statement B: "Distribution of stomata is different in different plants."
This is correct.
Stomatal distribution varies by species and habitat. For example, monocot leaves typically have stomata on both surfaces (amphistomatic), while dicot leaves often have stomata primarily on the lower surface (hypostomatic) to reduce water loss.
- Statement C: "Distribution, number, size and type of stomata are same in every plant."
This statement is incorrect.
Stomatal traits show high evolutionary diversity and vary significantly between species.
For example, xerophytic plants have fewer, sunken stomata to conserve water, whereas hydrophytic plants may have stomata only on the upper surface of floating leaves.
- Statement D: "Size and type of stomata is different in different plants."
This is correct.
Stomatal size and types (such as anomocytic, anisocytic, paracytic, or diacytic) differ based on the taxonomic classification of the plant.
Step 3: Final Answer:
The correct option is (C).
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