Question

What are the characteristic differences found in vascular tissue of gymnosperms and angiospermratified epithelial cells have limited role in secretion. Justify their role in our skin?

Answer 1

Xylem functions as a conducting tissue for water and minerals from roots to the stem and leaves. It also provides mechanical strength to the plant parts. It is composed of four different kinds of elements, namely, tracheids, vessels, xylem fibres and xylem parenchyrtia. Gymnosperms lack vessels in their xylem.

• Phloem transports food materials, usually from leaves to other parts of the plant. Phloem in angiosperms is composed of sieve tube elements, companion cells, phloem parenchyma and phloem fibres. Gymnosperms have albuminous cells and sieve cells. They lack sieve tubes.

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Answer 2

Characteristic differences found in vascular tissue of gymnosperms and angiosperms

Explanation:-

• The xylem serves as a conducting tissue for water and minerals from the roots to the stem and leaves.
• It moreover gives mechanical stability to the plant portions.
• It is composed of four different types of elements, namely, tracheids, vessels, xylem fibers, and xylem parenchyma. The xylem of gymnosperms lacks vessels.
• Phloem carries food material, usually from leaves, to other parts of the plant.
• Phloem sieve in angiosperms is composed of tube elements, companion cells, phloem parenchyma, and phloem fibers.
• Gymnosperms have albuminous cells and sieve cells. They lack sieve tubes and companion cells.