This document discusses cells and their organization in living things. It includes diagrams of plant and animal cells labeling their structures and functions. It also diagrams the levels of organization of cells into tissues, organs and systems in the human body. Examples are given of respiratory and blood cells and the systems they are found in. Different types of cells found in humans are shown and their characteristics described. Organisms including euglena, paramecium, amoeba and spirogyra are classified based on whether they are single-celled or multicellular.

1. Form1 Science
Chapter 2
JPNPahang 2009 11
FORM 1 CHAPTER 2
CELL AS A UNIT OF LIFE
1. Diagram 1 shows the structures of a plant cell.
(a) Label the following on Diagram 1.
Nucleus Vacuole Cell membrane
[3 marks]
(b) State the function of the parts labelled M and N.
M: ……………………………………………………………………………………………………
N: …………………………………………………………………………………………………..
[2 marks]
(c) Name one structure of the plant cell which is not found in an animal cell.
………………………………………………………………………………………………………
[1 mark]
Diagram 1
M
N

2. Form1 Science
Chapter 2
JPNPahang 2009 12
2. Diagram 2.1 shows the organisation of cells in the human body.
Diagram 2.1
(a) Label the stages of cell organisation on Diagram 2.1 using the following words.
System Cell Organ Tissue
[4 marks]
(b) (i) Name the system that is referred to in the above statement.
………………………………………………………………………………………………………
[1 mark]
(ii) Give one example of an organ found in this system.
……………………………………………………………………………………………………….
[1 mark]
(c) Diagram2.2 shows a cell found in the human body.
This system takes in oxygen and removes carbon dioxide from the body.
Diagram 2.2

3. Form1 Science
Chapter 2
JPNPahang 2009 13
(i) Name the cell shown in Diagram 2.2.
………………………………………………………………………………………………………
[1 mark]
(ii) What is the function of this cell?
……………………………………………………………………………………………………
[1 mark]
(iii) In which system is this cell found?
………………………………………………………………………………………………………
[1 mark]

4. Form1 Science
Chapter 2
JPNPahang 2009 14
3. Diagram 3 shows four types of cells P, Q, R and S which are found in the human body.
.
(a) Observe the cells in Diagram 3
Based on your observations, state one characteristic of each cell, P, Q, R and S.
P : ……………………………………………………………………………………………………
Q : …………………………………………………………………………………………. ……….
R : …………………………………………………………………………………………. ……….
S : …………………………………………………………………………………………………….
[4 marks]
P Q
R S
Diagram 3

5. Form1 Science
Chapter 2
JPNPahang 2009 15
(b) Classify cells P, Q, R, S, and T into two groups based on common characteristic.
Write the alphabets representing the cells belonging to each group.
[4 marks]
P, Q, R, and T
Common
characteristics
Alphabets
representing
the cells

6. Form1 Science
Chapter 2
JPNPahang 2009 16
4. Diagram 4 shows pictures of organisms R, S, T and U.
Based on your observations in on the figure,
(a) State one characteristic of each organism, R, S, T, and U.
R : …………………………………………………………………………………………………..
S : …………………………………………………………………………………………………..
T : …………………………………………………………………………………………………..
U : …………………………………………………………………………………………………..
[4 marks]
(b) Classify organisms R, S, T, and U into two groups based on common characteristics.
Give examples of organisms belonging to each group.
[4 marks]
C D
R, S, T, and U
Common
characteristics
Names of
organisms
R S T U
Diagram 4
Euglena Paramecium Amoeba Spirogyra

7. Form1 Science
Chapter 2
JPNPahang 2009 17
5. Diagram 5 shows cells M and N.
(a) Name cells M and N in the space provided in Diagram 5
[2 marks]
(b) P is where photosynthesis takes place. Label P in Diagram 5
[1 mark]
(c) Draw lines to match the structures of the cell and their functions.
[3 marks]
Diagram 5
M: …………………………
Q
N: ………………………
R
S
Structure Function
Regulates the movement of
substances in and out of the cell
Protects and maintains the shape of
the cell
Controls all activities of the cell
Contains cell sap
Q
R
S