First slide

The Tissues

Question

Choose the features shown by the following figure
A. Has bordered pits
B. Has lignified cell walls
C. Predominantly present in pteridophytes
D. Has perforation plates.

Easy

A

A, B and D
B

A, B and C
C

B, C and D
D

A, B, C and D

Solution

The figure is one of the tracheary elements known as tracheids. These are fusiform with tapering ends. They have only bordered pits in their secondary cell wall. Tracheids are predominantly present in pteridophytes and gymnosperms. They do not have perforation plates.

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