1
National 5 Biology
Unit 2 – Multicellular Organisms
Name: ____________________________________
Teacher: ___________________________________
2
National 5
Unit 2: Multicellular Organisms
Homework Booklet
HW
No
DUE
1
TOPIC
MARK
%
Cells, tissues, and
organs
9
2
Stem cells and
meristems
12
3
Control and Communication
17
4
Reproduction
9
5
Variation
14
6a
Transport in
Plants
20
6b
Transport in Animals
20
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Parental Signature:
____________________________
COMMENT
3
1—Cells, tissues and organs
1.
4
2.
5
2
6
2—Stem Cells and Meristems
1
a.
b.
2
7
3. (a) Name the type of cells which are undifferentiated and have the potential
to turn into other cell types in plants and animals.
__________________________
(1)
(b) (i) One source of these cells are from embryos. Describe one advantage
and one disadvantage from using these undifferentiated cells from
embryos.
Advantage _____________________________________________________
______________________________________________________________
(1)
Disadvantage ___________________________________________________
_____________________________________________________________
(1)
(ii) Apart from embryos, state one other source of these types of cells.
_____________________________
(1)
(c) Describe a potential use for these types of cells.
___________________________________________________________
___________________________________________________________
___________________________________________________________
(1)
4. The following statements refer to meristems.
Which two statements are correct? ______ and ______
(1)
8
5. The chart below shows how some specialised cell types are formed from stem
cells.
(a) Which intermediate cell can develop into the widest range of mature cell
types?
_____________________________
(1)
(b) Which type of intermediate cell forms both elastic and non-elastic
fibres?
____________________________
(1)
(c) At which stage in an animal’s development are stem cells most abundant?
____________________________
(1)
9
3—Control and Communication
1
3
2
4
10
5
11
6a
b
12
7
4—Reproduction
1
2
13
14
3. (a) The diagram below shows a summary of events that occur during
reproduction in a flowering plant.
(i) Complete the diagram by entering the name of cell type R.
(1)
(ii) Which process in the diagram represents fertilisation?
__________________________________________
(1)
(iii) Complete the following table by inserting a tick (√) in the correct boxes
to show which of the cells in the diagram have a double or single set of
chromosomes.
(2)
(b) Explain the need to produce cells with a single set of chromosomes in
reproduction.
____________________________________________________________________
____________________________________________________________________
(1)
5—Variation and Inheritance
1
15
16
2
17
3
6a—Need for Transport in Plants
18
1
a) Insert the correct name of each structure in the table below.
Letter Leaf Structure
A
B
C
D
E
F
3
b) Complete the following table
Type of cell or tissue
Description
Absorbs water from soil solution
Lignified to withstand pressure changes during
transport of water
Main site of photosynthesis in a leaf
Controlled by a companion cell
Protective layer on outside of plant organs
Controls opening and closing of stomata
3
19
2
20
3
21
4
6b—Animal Transport
1
2
3
22
23
4
5
24
6
25
7
26
8
10
9
11
27
12