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Question

The water-conducting tissue generally present in gymnosperm is


A

vessels

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B

sieve tube

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C

tracheid

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D

xylem fibres

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Solution

The correct option is C

tracheid


The correct option is option C.

Explanation of the correct option:

  1. The complex tissue of plants that helps in the conduction of water and minerals from roots to other parts of plants is called the xylem.
  2. It provides mechanical support to plant parts
  3. In flowering plants, the Xylem is composed of four different elements namely tracheids, xylem vessels, xylem fibers, and xylem parenchyma.
  4. In gymnosperms xylem vessels are not present, therefore Xylem tracheids are the main conducting tissue in these plants.
  5. Xylem tracheids are the elongated, tube-like cells with thick lignified walls that are the main conducting tissue that transports water from the roots of plants to stem and leaves by diffusion.

Explanation of the incorrect options:

Option A:

  1. In gymnosperms xylem vessels are absent therefore, this option is incorrect.
  2. In angiosperms, Xylem vessels are long cylindrical tube-like structure with lignified walls, that helps in the conduction of water.

Option B:

  1. The complex tissue of plants that helps in the conduction of food from leaves to other parts of plants is called phloem.
  2. In angiosperms, phloem is composed of sieve tubes, sieve elements, phloem parenchyma, and phloem fibers.
  3. Sieve tube elements are the long tube-like structures arrange longitudinally and remain associated with companion cells, that help in the conduction of food from leaves to other parts of the plant.
  4. Sieve tubes help in the conduction of food, therefore it is incorrect.

Option D:

  1. Xylem fibers are cells with thick walls and xylem parenchyma are living thin-walled cells that help in storing food in form of starch or fat.
  2. Xylem fibers store food, hence it is incorrect.

Final Answer: the water-conducting tissue generally present in gymnosperm is tracheid.


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