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Chapter 2: Problem 25

Which one the following is a dead tissue? (a) Parenchyma (b) Collenchyma (c) Sieve-tube cells (d) Xylem tracheids

Short Answer

Expert verified
a) Parenchyma b) Collenchyma c) Sieve-Tube Cells d) Xylem Tracheids Answer: d) Xylem tracheids

Step by step solution

01

Understand Parenchyma Tissue

Parenchyma is a simple, living plant tissue consisting of thin-walled cells that can have a variety of functions such as photosynthesis, storage, and secretion. Since parenchyma is a living tissue, it cannot be a dead tissue.
02

Understand Collenchyma Tissue

Collenchyma is also a living plant tissue composed of elongated, unevenly thickened cells that provide support, particularly in growing stems and leaves. Due to its function and the fact that it is a living tissue, collenchyma is not a dead tissue.
03

Understand Sieve-Tube Cells

Sieve-tube cells are specialized, living cells found in the phloem of flowering plants. These cells are responsible for transporting organic materials and nutrients within the plant. As sieve-tube cells are living cells, they are not a dead tissue.
04

Understand Xylem Tracheids

Xylem tracheids are elongated, tapering cells that form the xylem, which is responsible for the transport of water and minerals from the roots to the rest of the plant. Unlike the other options, xylem tracheids are non-living, dead cells that provide structural support along with water and mineral transport in plants.
05

Determine the Dead Tissue

Based on our analysis, the only option consisting of dead tissue is (d) Xylem tracheids. Therefore, the answer to this exercise is (d) Xylem tracheids.

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