First slide

The Tissues

Question

These have pits in their cell walls
I. parenchyma cells II. Collenchyma cells III. Fibers IV. Sclereids

Easy

A

I, II, III
B

II, III, IV
C

I, II, III, IV
D

III and IV only

Solution

Pits are seen only in those cells with secondary cell walls because pits are regions of secondary cell wall where there is no deposition of secondary cell wall material. They may be simple pits or bordered pits. Since parenchyma and collenchyma have only primary wall they do not have pits but primary pit fields may be present.

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