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Doctors Medicines MCQs Q&A

  1. Sclerenchyma
  2. Meristem
  3. Collenchyma
  4. Aerenchyma
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Option 4 : Aerenchyma

The correct option is Aerenchyma.
CONCEPT:

  • Hydrophytes are aquatic plants that are either partially or fully submerged in water.
  • Partially submerged hydrophytes like Lilly have stomata present on their upper leaf surface (lower pat is submerged in water).
  • Fully submerged hydrophytes like water ferns do not have stomata, instead of stomata, the plant's surface cells are capable of absorbing water, nutrients, and dissolved gases in the water.
  • Aerenchymas are the spaces or air channels in the leaves, stems, and roots of Hydrophytes.
  • It is an adaptation of hydrophytes, these air spaces provide buoyancy to the plants
  • Thereby, Aquatic plants have a well-developed aerenchyma system

  • Chlorenchyma:
    • chlorenchyma Parenchyma tissue contains chloroplasts and is photosynthetic.
    • Chlorenchyma makes up the mesophyll tissue of plant leaves and is also found in the stems of certain plant species.
    • A chlorenchyma has chlorophyll-containing plastids called chloroplasts. A chloroplast is a plastid that contains high amounts of green pigment.
  • Parenchyma:
    • Parenchyma tissue is composed of thin-walled cells and makes up the photosynthetic tissue in leaves, the pulp of fruits, and the endosperm of many seeds.
    • Collenchyma cells mainly form supporting tissue and have irregular cell walls.
    • They are found mainly in the cortex of stems and in leaves.
  • ​Sclerenchyma is the permanent tissue that makes a plant hard and stiff.
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Related Questions

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