Question:
Match List-I with List-II
List-I (Time of opening/closure of stomata) & List-II (Crop/plant examples)
(A). Stomata open throught the day and close during night & (I). Cabbage, Banana, Allium
(B). Stomata close for a few hours in the evening & (II). Amphibious plants: Emergent hydrophytes
(C). Stomata open for a few hours during the day & (III). Pea, Bean, Mustard
(D). Stomata remain open during day and night & (IV). Cereals
Choose the correct answer from the options given below:
Match List-I with List-II
List-I (Time of opening/closure of stomata) & List-II (Crop/plant examples)
(A). Stomata open throught the day and close during night & (I). Cabbage, Banana, Allium
(B). Stomata close for a few hours in the evening & (II). Amphibious plants: Emergent hydrophytes
(C). Stomata open for a few hours during the day & (III). Pea, Bean, Mustard
(D). Stomata remain open during day and night & (IV). Cereals
Choose the correct answer from the options given below:
List-I (Time of opening/closure of stomata) & List-II (Crop/plant examples)
(A). Stomata open throught the day and close during night & (I). Cabbage, Banana, Allium
(B). Stomata close for a few hours in the evening & (II). Amphibious plants: Emergent hydrophytes
(C). Stomata open for a few hours during the day & (III). Pea, Bean, Mustard
(D). Stomata remain open during day and night & (IV). Cereals
Choose the correct answer from the options given below:
Show Hint
Remember the classic Loftfield types:
- Alfalfa type = Open all day, closed at night.
- Barley type = Open only a few hours during the day.
- Equisetum type = Permanently open.
Updated On: Jul 13, 2026
- (A) - (IV), (B) - (III), (C) - (II), (D) - (I)
- (A) - (II), (B) - (IV), (C) - (I), (D) - (III)
- (A) - (I), (B) - (III), (C) - (IV), (D) - (II)
- (A) - (III), (B) - (I), (C) - (IV), (D) - (II)
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
Stomatal movement is classified into distinct physiological types (Loftfield classification) based on the timing of stomatal opening and closing.
These patterns are adaptations to regulate transpiration and gas exchange in different plant groups.
Step 2: Detailed Explanation:
Let's pair each stomatal movement pattern in List-I with its plant group in List-II:
- (A) Alfalfa/Lucerne Type: Stomata remain open throughout the day and close only during the night.
This pattern is typical of mesophytic $\text{C}_3$ crops with thin leaves, such as Pea, Bean, and Mustard (III).
- (B) Potato Type: Stomata remain open during the day and night but close for a few hours in the evening.
This pattern is observed in plants like Cabbage, Banana, and Allium (I).
- (C) Barley/Cereal Type: Stomata open for only a few hours during the day when conditions are favorable.
This water-conserving pattern is typical of Cereals (IV) like barley and wheat.
- (D) Equisetum Type: Stomata remain permanently open during both day and night.
This pattern is characteristic of Amphibious plants Emergent hydrophytes (II) that grow in waterlogged soils where water conservation is unnecessary.
This matching sequence corresponds to Option 4.
Step 3: Final Answer:
The correct match is (A) - (III), (B) - (I), (C) - (IV), (D) - (II).
Stomatal movement is classified into distinct physiological types (Loftfield classification) based on the timing of stomatal opening and closing.
These patterns are adaptations to regulate transpiration and gas exchange in different plant groups.
Step 2: Detailed Explanation:
Let's pair each stomatal movement pattern in List-I with its plant group in List-II:
- (A) Alfalfa/Lucerne Type: Stomata remain open throughout the day and close only during the night.
This pattern is typical of mesophytic $\text{C}_3$ crops with thin leaves, such as Pea, Bean, and Mustard (III).
- (B) Potato Type: Stomata remain open during the day and night but close for a few hours in the evening.
This pattern is observed in plants like Cabbage, Banana, and Allium (I).
- (C) Barley/Cereal Type: Stomata open for only a few hours during the day when conditions are favorable.
This water-conserving pattern is typical of Cereals (IV) like barley and wheat.
- (D) Equisetum Type: Stomata remain permanently open during both day and night.
This pattern is characteristic of Amphibious plants Emergent hydrophytes (II) that grow in waterlogged soils where water conservation is unnecessary.
This matching sequence corresponds to Option 4.
Step 3: Final Answer:
The correct match is (A) - (III), (B) - (I), (C) - (IV), (D) - (II).
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