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Question

Pneumatophores occur in ?


A

Carnivorous plants

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B

Free-floating hydrophytes

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C

Halophytes

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D

Submerged hydrophytes

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Solution

The correct option is C

Halophytes


The correct option is C

Explanation for the correct answer:

  1. In halophytes, such as mangrove trees, there are respiratory roots called pneumatophores.
  2. Halophytes' breathing roots protrude into the water to absorb oxygen because they flourish in saline marshes.
  3. Additionally, it releases an excessive amount of CO2.
  4. Lenticels are tiny pores that make this possible.
  5. Carnivorous plants, hydrophytes that float freely, and hydrophytes that are submerged all lack pneumatophores.

Explanation for the incorrect answer:

Option A:

  1. Carnivorous plants get part or all of their nutrition by catching and eating animals or protozoans, most commonly insects and other arthropods.
  2. Photosynthesis still provides some energy to carnivorous plants.

Option B:

  1. Hydrophytes that float on the water's surface are known as free-floating hydrophytes.
  2. However, the roots of certain species stay entrenched in the mud, and only the flowers and leaves of the plant float on water, thus the submerged leaves compensate for the roots.

Option D:

  1. They are submerged in water, either partially or completely.
  2. Stomata are present on the upper leaf surface of partially submerged hydrophytes like Lilly.

Final answer: Pneumatophores occur in Halophytes.


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