Question

Which of the following is not a component of the xylem tissues? it's option is tracheids,sieve tubes,vessels,xylem fibres.​

Answer 1

Explanation:

This is the answer for your question.

Answer 2

Among the following options SIEVE TUBE is not a component of the xylem tissue.

SIEVE tube is a component of Phloem tissue.

Here in the given options Tracheids, vessels, and xylem fibers are the components of the xylem.

Sieve tubes, companion cells, Phloem parenchyma, and Phloem fibers are the components of Phloem.

Xylem -

• Xylem is the vascular tissue.
• It transports water and salts dissolved in it.
• Almost all the cells of this tissue are dead, thick-walled, and rich in lignin.

They have the following four different components-

(i) Tracheids -

• These are dead and long tube-like formations.
• It does not have holes at its ends.
• Their walls are thick, hard and rich in lignin.
• They are of different sizes.
• They carry water and mineral salts from the root to the leaves.
• They also serve to support the soft parts of the plant.

(ii) Vessels -

• They are like dead narrow tubes.
• In these, large cell cavities are found for the transport of water and mineral salts from the root to the leaves.
• They perform mechanical functions and also provide firmness to the plant body.

(iii) Xylem or Wood Parenchyma -

• These are living and thin cells.
• They help in water transport and also store food.

(iv) Xylem fibers -

• These are long, pointed, non-living, and rigid cells.
• They have small troughs and their walls are rough.
• They give strength and support to the plants.

Functions of xylem and Phloem:

Xylem conducts water and minerals from roots to various plant parts and  Phloem conducts food from leaves to various plant parts.

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