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  4. Which among the structure has an elongated, unbranched, pointed, and needle-like apices?

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Q. Which among the structure has an elongated, unbranched, pointed, and needle-like apices?

NTA AbhyasNTA Abhyas 2020Anatomy of Flowering Plants

Solution:

Phloem fibers are the dead, unbranched structures with needle-like apices. The cell wall is quite thick, without protoplasm. They are also known as Bast fibers. Phloem fibers of jute, flax, and hemp are used commercially.