NEET BIOLOGY

PLANT PHYSIOLOGY

TRANSPORT IN PLANT

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Xylem fibres are made of-
A
Parenchyma cells
B
Collenchyma cells
C
Sclerenchyma cells
D
Aerenchyma cells
Explanation: 

Detailed explanation-1: -Xylem fibres are non-living sclerenchyma cells. Because of their elasticity and tensile strength, they are an important component of the xylem. They protect and provide mechanical support to the xylem’s major water-carrying tissues. Water is transported through xylem fibers.

Detailed explanation-2: -Xylem fibers are the thick lignified fibers that are made up of the dead sclerenchyma cells. These are located between the xylem vessels and the tracheid of the xylem in a plant. They are hard tissues and are woody in nature.

Detailed explanation-3: -Vascular parenchyma: these are present in vascular tissue. The xylem contains xylem parenchyma and the phloem contains phloem parenchyma.

Detailed explanation-4: -The xylem consists of tracheary elements, xylem parenchyma cells, and xylem fiber cells. Tracheary elements are dead, hollow cells with patterned cell walls comprising xylem vessels and tracheids, which function as conductive hollow tubes for water and nutrient transport throughout the plant body.

Detailed explanation-5: -Xylem and phloem vessels are grouped together within the plant stem and form vascular bundles. Sclerenchyma fibres are also found within vascular bundles and provide support to the stem. Within the plant stem, xylem vessels are found right on the inside.

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