Q1.
Some children were learning about food webs.
They made this web about British animals.
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(a)
Use the food web to help you answer the following questions.
The tawny owl is a predator in more than one food chain.
Write down each food chain in which the tawny owl is a predator.
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1 mark
(b)
In autumn, swallows migrate (fly to warmer countries).
Kestrels do not migrate.
Use the food web to compare the prey of each of these two birds.
Suggest why swallows migrate, but kestrels do not.
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1 mark
(c)
Hobbies migrate in autumn.
If fewer hobbies returned to Britain in spring, some animals in the food web might
increase in number during the year.
On the web, draw a circle around all the animals which might increase in number if
fewer hobbies returned.
2 marks
Q2.
(a)
One-celled organisms called dinoflagellates live in the coral reefs of the
oceans.
This is a simplified diagram of a dinoflagellate.
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Name the part of the cell that allows each dinoflagellate to carry out photosynthesis.
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1 mark
(b)
Look at these food chains of living things around a coral reef:
Name the secondary consumer in the food chains above.
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1 mark
(c)
The pyramid below represents the number of organisms feeding at each level
around the coral reef.
Write the name of the correct living thing on each label line below.
Use ONE food chain from part (b) to help you.
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1 mark
(d)
Dinoflagellates can take in harmful chemicals from a polluted ocean.
The amount of harmful chemicals in one dinoflagellate would not kill a human.
Explain why a human eating barracuda from these food chains could take in enough
harmful chemicals to be killed.
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1 mark
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