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Question

Which of the following have sunken stomata?


A

zea mays

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B

Hydrilla

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C

Nerium

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D

Mangifera

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Solution

The correct option is C

Nerium


The correct option is C

Explanation of correct option:

Sunken stomata

  1. The stomata that are hidden from the outer surface are called sunken stomata.
  2. It helps in reducing the loss of water from leaves by protecting water vapors from the air.
  3. Xerophytes have sunken stomata to prevent water loss from the plant.
  4. Examples - Pine, Acacia, Nerium, etc

Nerium

  1. Its common name is Oleander.
  2. It has medicinal properties used in the treatment of hemorrhoids, Leprosy, ulcers, etc.
  3. The xerophyte Nerium possesses sunken stomata to reduce water loss through transpiration.

Explanation of incorrect options:

Option A

  1. Two pore-forming guard cells and two neighboring subsidiary cells make up Zea mays' stomatal complex.
  2. They have normal stomatal conditions to facilitate photosynthesis.

Option B

  1. Hydrilla is a perennial herb that grows in water and is also known as water thyme.
  2. Their stomata are absent as no transpiration happens underwater.

Option D

  1. Mangifera is a terrestrial plant.
  2. It has a dicot leaf having stomata that are open and are in normal conditions.

Final answer: Nerium have sunken stomata


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