National 5 Biology
Multicellular Organisms
Homework
b) Stem Cells and Meristems
Holy Cross High School
Page 1
HOMEWORK 1
(9 Marks)
1. (a) Name the undifferentiated cells which have the potential to become specialised cell
types in animals.
__________________________
(1)
(b) (i) These cells can be obtained from embryos. Describe one advantage
and one disadvantage from using these undifferentiated embryonic cells.
Advantage __________________________________________________
___________________________________________________________
(1)
Disadvantage _______________________________________________
__________________________________________________________
(1)
(ii) Apart from embryos, state one other source of these cell types.
_____________________________
(c)
(1)
Describe a potential use of these cell types.
____________________________________________________________
____________________________________________________________
____________________________________________________________
2.
(1)
The following statements refer to meristems.
Which two statements are correct?
Holy Cross High School
______ and ______
(1)
Page 2
HOMEWORK 1 (continued)
3.
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?
_____________________________________________
(c)
(1)
At which stage in an animal’s development are stem cells most abundant?
_____________________________________________
Holy Cross High School
(1)
Page 3
HOMEWORK 2
(10 Marks)
1.
The diagram below shows a vertical section though a shoot.
(a)
Place a circle on the diagram above to indicate the position of a meristem.
(b)
Name the process which takes place in the meristem.
_____________________________________________________
(c)
(1)
Name another part of a plant cell where a meristem can be found.
_____________________________________________________
3.
(1)
Name the experiment which can be carried out to examine the cells in the meristem
_____________________________________________________
(d)
(1)
(1)
Indicate in the table below if the statement is true or false
Statement
True/False
Nerve cells are differentiated cells
Embryonic stem cells are taken from the embryo
There are no stem cells in an adult human.
Embryonic stem cells are the only type of stem cells under
investigation by scientists
The role of tissue stem cells in the body is to provide
replacement cells to repair damaged or worn out cells
One characteristics of stem cells is that they can self-renew
(6)
Holy Cross High School
Page 4