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Question

When stomata are present only on the lower side of leaf, the condition is called as:

A
Epistomatic.
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B
Hypostomatic.
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C
Amphistomatic.
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D
None of the above.
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Solution

The correct option is C

Explanation of the correct option:

  1. When stomata are present only on the lower side of leaf, it is called as hypostomatic.
  2. This is a condition when leaves have stomata mostly on the underneath, i.e., the foliar abaxial surface.

Explanation of the incorrect options:

Option A:

  1. Leaves, in which stomata are present on the upper epidermis, i.e., on adaxial surface of the leaf are called epistomatic leaves.
  2. In Nympheae, Nelumbo, Victoria, epistomatic leaves are present.

Option B:

  1. A leaf is said to be called as amphistomatic when the stomata is present on both the side of leaf.
  2. It means the stomatas are present in both abaxial and adaxial surfaces of the leaf.

Option D:

  1. ​In hypostomatic condition the maximum number of stomatas are present on the lower abaxial surface.
  2. Hence, this option is invalid.

Final answer:

When stomata are present only on the lower side of leaf, the condition is called as

hypostomatic

.


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