First slide

The Tissues

Question

Find the incorrectly matched pair.

Easy

A

Companion cells- Maintain the pressure in sieve tubes
B

Pholoem fibres-Absent in Secondary phloem.
C

Vessels - Absent in gymnosperms.
D

Sieve tubes- Perforations in their end walls.

Solution

Phloem fibers are present in secondary phloem but usually absent in primary phloem.

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