Lesson: Chapter 1 — Living Tissues

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Question 1

Which of the following is the non-living cell type?

A Sieve cells B Collenchyma C Fibres D Parenchyma

The right answer is the one marked above.

Fibres. Sclerenchyma fibres are dead cells — lignin coats the wall all round and cuts the contents off.

Sieve tube cells are the tempting wrong answer: they have no nucleus, but they are alive, and a companion cell controls them.

Answer the question to continue.