Q. Which of the following tissues is composed of mainly dead cells?

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Solution:

Xylem is a primary conducting tissue which is responsible for transporting water to plant body. It is mainly composed of dead cells as 3 of its 4 component are formed of dead cells. Xylem contain tracheids , vessels, xylem parenchyma and xylem sclerenchyma . Out of these, tracheids, vessels and xylem sclerenchyma are dead.