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PRACTICE EXAMINATION
BIOLOGY
Time for examination: 40 minutes
Calculators may be needed
1. In each of these questions, underline the word or phrase which you think makes the best answer (1 mark each)
a) All living cells will contain a
cell wall nucleus chloroplasts vacuole
b) An organ responsible for excreting waste is the
kidney stomach bladder heart
c) During a persons sleep the heart rate will
increases decreases stay the same stops
d) Plasma, the liquid part of the blood, carries
oxygen starch urine dissolved food
e) The first organism in a food chain is known as a
herbivore producer consumer predator
2. Here is a drawing of some human tissue as seen under a microscope.

a. Clearly label on the drawing a nucleus and a cell
membrane (2 marks)
b. If you looked at a slide of some cells from inside a leaf, you
would see certain structures which are not present in human cells.
Name two such structures
i. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (2)
2. Look at the drawing of a microscope shown which has the following lenses
Eyepiece magnification = x 10
Objective lens magnification = x 40

a) Add the following labels:
objective lens eyepiece mirror stage focus
control (4)
b) What is the total magnification?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (1)
3. Select five organs from the following list and write them at the ends of the correct pointers in the diagram. (5)
bladder heart intestine kidney liver lung stomach

Which of the organs you named above is responsible each of the following:
i. adding oxygen to the blood. . . . . . . . . . . . . . . . . . . . . . . .
ii. pumping the blood. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
iii. digesting food. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
iv. storing urine. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (4)
2. The diagram shows a human foetus at 3 months gestation.

a. Name the parts numbered 1, 2 and 3
in the diagram
1. . . . . . . . . . . . . . . . . . . . . . . . .
2. . . . . . . . . . . . . . . . . . . . . . . . .
3. . . . . . . . . . . . . . . . . . . . . . . . . . (3)
b. How does the fetus obtain its food?
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (3)
c. Explain how the foetus is protected from damage if the mother falls over
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .(2)
d. Name one substance that passes from the mother to the embryo during pregnancy .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .(1)
e. Explain what is meant by the word gestation?
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .(1)
3. A teacher asked one of his students to blow into some limewater which went cloudy.
The student was then required to run around the school running track.
When he returned, now slightly out of breath and breathing more deeply, he was asked to blow into the limewater again. This time the limewater went cloudy more quickly than the first.
a. What gas was being tested for by blowing into limewater?
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .(1)
b. Name the process that was being carried out by the cells in the boy’s body that was producing this gas. . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . (1)
c. Name two substances needed by the cells to enable them to carry out this process:
i . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ii . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . (2)
d. Why did the limewater turn cloudy more quickly the second time he blew into it?
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (2)
e. Why was the boy breathing more deeply when he returned from the run?
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .(1)
f. Describe one other change (as well as being out of breath) that the teacher might have noticed in the boy’s body when he returned:
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .(1)
g. Complete the word equation for the process which releases energy from sugar in our cells
Sugar + _____________ ➞
______________+ _____________ + energy
(3)
h. Write down 3 ways our body uses the energy it releases from sugar
i . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ii . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
iii . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (3)
4. Look at the cross section of the flower below, which comes from an apple tree.
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a) Complete the labels shown on the diagram (5)
b) Mark an arrow (and label it X) to show where the pollen is formed. (1)
c) Mark an arrow (and label it Y) to show where the ovules would be found.
d) Is the plant above
WIND or INSECT pollinated?
Give a reason for your answer.
................................................................................................................................................. (3)
e) After the flower above has been fertilized explain what happens to:
i The petals:...........................................................................................................
ii. The ovary:............................................................................................................
iii. The ovules:..................................................................................................... (3)
f) Where in a plant would the genetic information be found?
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . (1)
5.
How do you think the
apple plant spreads it's seeds.
Give a reason for your answer.
................................................................................................................................................. (2)
Describe one other
way that a plant you know spreads its seeds
name of plant: ………………………………………. (1)
How it spreads its seeds
………………………………………………………………………………………….(1)
Explain why it is a good idea for the plant to scatter its seeds around, rather than just let them fall to the ground
………………………………………………………………………………………….(2)
6. The top layer of soil of a wood is often very rich in humus and yet there are few plants growing there.
a. What is humus?.......................................................................................................... (1)
b. Why is humus important?
......................................................................................................................................................
................................................................................................................................................. (2)
b.
Why are there so few
plants on the floor of a forest or wood?
.......................................................................................................................................
(1)
c. How are the plants that you do find there adapted to help them survive?
................................................................................................................................................. (1)
(Total 60 marks)