national 5 iology unit 2 – multicellular...
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National 5 Biology
Unit 2 – Multicellular Organisms
Name: ____________________________________
Teacher: ___________________________________
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National 5
Unit 2: Multicellular Organisms
Homework Booklet
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HW
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TOPIC MARK % COMMENT
1 Cells, tissues, and
organs
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2 Stem cells and
meristems
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3 Control and Com-
munication
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4 Reproduction
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5 Variation
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6a Transport in
Plants
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6b Transport in Animals
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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)
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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)
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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)
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6a—Need for Transport in Plants
Letter Leaf Structure
A
B
C
D
E
F
b) Complete the following table
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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
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a) Insert the correct name of each structure in the table below.
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