First slide

The Tissues

Question

Which is correct regarding tracheids?

Easy

A

They have protoplasm
B

They are living and thin-walled
C

They are main water transporting elements in gymnosperms
D

They have obliterated central lumen.

Solution

Tracheids are elongated or tube-like cells with thick and lignified walls and tapering ends. These are dead and are without protoplasm. The inner layers of the cell walls have thickenings which vary in form. In gymnosperms, tracheids are the main water transporting elements.

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