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Worksheets0654_2017_O/N_QP_22_Biology
Total questions: 13
Worksheet time: 13mins
1.What is homeostasis?
the maintenance of the body’s external environment
the maintenance of the body’s internal environment
the processes that produce heat in the body
the removal of wastes from the body
2.What is excretion?
breakdown of materials in kidney cells
chemical reactions in liver cells
removal of undigested food from the gut
removal of waste products
3.What would increase the risk of coronary heart disease?
reduced salt diet
relaxation therapy
regular exercise
smoking tobacco
4.Which statements about X chromosomes in humans are correct?
A
B
C
D
5.The test-tube shows gelatine with a layer of black dye. The dye can diffuse through the gelatine.
What was the appearance of the test-tube after six hours?
6.Which component of cigarette smoke can bind to haemoglobin and reduce the ability of the blood
to carry oxygen?
carbon monoxide
nicotine
smoke particles
tar
7.When a suspension of powdered milk is completely digested by a protease enzyme it becomes
clear.
The graph shows the time taken for a mixture of protease and powdered milk to clear at different
temperatures.
What is this enzyme’s optimum temperature?
5 °C
37 °C
40 °C
50 °C
8.What is a function of bile?
emulsifying carbohydrates to decrease the surface area for the action of enzymes
emulsifying carbohydrates to increase the surface area for the action of enzymes
emulsifying fats to decrease the surface area for the action of enzymes
emulsifying fats to increase the surface area for the action of enzymes
9.Predators that hunt at night have large eyes and ears.
This has resulted from the passing on of genes by the best-adapted organisms.
What is this process called?
artificial selection
conservation
homeostasis
natural selection
10.Why might auxins be used in the commercial growth of plants?
to increase uptake of carbon dioxide for increased photosynthesis
to reduce the amount of water needed by the plants
to regulate growth of particular parts of the plants
to stimulate production of chlorophyll for increased yield
11.A plant has a flower with a feathery, exposed stigma.
What does this tell us about the plant?
It is insect-pollinated.
It is wind-pollinated.
Its fruits are animal-dispersed.
Its fruits are wind-dispersed.
12.Lichens grow on the bark of trees. Lichen growth can be affected by sulfur dioxide and other pollutants. Their absence is often used as an indicator of pollution.
The table shows the percentage cover of lichens at distances from the centre of a large city.
Which conclusion can be made from these results?
Lichen growth is reduced by sulfur dioxide.
Lichens cannot survive in the city.
Lichens grow better further away from the city centre.
Lichens grow equally well on all species of trees.
13.Which statement about food chains is correct?
A carnivore is a consumer that gets its energy from plants.
A carnivore is a producer that gets its energy from animals.
A herbivore is a consumer that gets its energy from plants.
A herbivore is a producer that gets its energy from animals.
