Summative Practice Chapter 1 – Question 1 & 2 (Form 5 Biology Textbook Exercise and Answer)

Question 1:
Figure 1 shows three examples of tissues which are found in plants.

Identify tissue A, tissue B and tissue C. State one characteristic and function of each tissue.

Tissue A: Meristematic tissue
Characteristic: Has thin cell walls, large nucleus, dense cytoplasm and small vacuoles.
Function: Young tissue that actively divides through mitosis

Tissue B: Collenchyma tissue
Characteristic: Cells walls made of pectin and hemicellulose
Function: Provides mechanical support and elasticity to plants

Tissue C: Sclerenchyma tissue
Characteristic: Has a very thick cell wall
Function: Provides support and mechanical strength to the parts of matured plants.

Question 2:
Figure 2 shows a longitudinal cross-section of a eudicot shoot tip.

(a) Name Zone I, Zone II and Zone III.

(b)(i) Draw a cell to represent Zone I and Zone II.
(ii) State the differences between the cell in Zone I and cell in Zone II.

(c) Draw a cross-section of the shoot at XY.

(d) After a few years, the plant undergoes secondary growth. Draw a cross-section of the plant stem which has undergone the secondary growth.

Zone I: Zone of cell division
Zone II: Zone of cell elongation
Zone III: Zone of cell differentiation


The cells in Zone I have larger nucleus compared to the nucleus found in cells from Zone II.
Most cells in Zone I have small vacuoles while cells in Zone II have large vacuoles.



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