MCQ-1: Human Influences on Ecosystems
There are twenty questions in this quiz. Select the correct answer from the given choices.
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Question 1 of 20
1. Question1 point(s)
The diagrams show the current population sizes for people below 50 years of age in four different countries.
Which country will be likely to have the largest population of people 60 – 70 years of age in 20 years time?CorrectIncorrect
Question 2 of 20
2. Question1 point(s)
What makes nuclear fall-out dangerous to living organisms?CorrectIncorrect
Question 3 of 20
3. Question1 point(s)
A very large area of land has been cleared of rainforest and planted with soybean.
What result of deforestation will encourage the growth of the soybean plants?CorrectIncorrect
Question 4 of 20
4. Question1 point(s)
The map shows a river flowing into the sea. The river is polluted by untreated sewage.
At which labelled point will the oxygen content of the water be lowest?CorrectIncorrect
Question 5 of 20
5. Question1 point(s)
Some bacteria were grown in a nutrient solution over a period of two weeks. The graph shows how the population of bacteria changed during this time.
Which is the lag phase in the growth of this population?CorrectIncorrect
Question 6 of 20
6. Question1 point(s)
Weeds are growing in a crop.
What should be used to kill the weeds?CorrectIncorrect
Question 7 of 20
7. Question1 point(s)
A large area is heavily overgrazed for many years.
How does this affect soil nutrients and soil erosion?
soil nutrients soil erosion A decrease decrease B decrease increase C increase decrease D increase increaseCorrectIncorrect
Question 8 of 20
8. Question1 point(s)
The diagram shows some of the effects of human activity on a river.
What could have caused these effects?CorrectIncorrect
Question 9 of 20
9. Question1 point(s)
In an ecosystem, which are the only organisms to remove carbon dioxide from the atmosphere?CorrectIncorrect
Question 10 of 20
10. Question1 point(s)
What name is given to the diagram below?CorrectIncorrect
Question 11 of 20
11. Question1 point(s)
The diagram shows the results of a survey on the types of animals found along a stretch of river near to a factory.
Which of the following animals lives in the most polluted water?CorrectIncorrect
Question 12 of 20
12. Question1 point(s)
The graph shows how oxygen concentration and the number of bacteria change when sewage is added to a river.
What describes the oxygen concentration and the number of bacteria between the point at which sewage is added and point P?CorrectIncorrect
Question 13 of 20
13. Question1 point(s)
On the map shown, sulfur dioxide is produced at X. Which region is most likely to experience acid rain?CorrectIncorrect
Question 14 of 20
14. Question1 point(s)
The diagram shows how the size of a population may change with time.
At which point is the population growing the fastest?CorrectIncorrect
Question 15 of 20
15. Question1 point(s)
Which agricultural activity can cause the most pollution?CorrectIncorrect
Question 16 of 20
16. Question1 point(s)
The graph shows the levels of dissolved oxygen and mineral ions in a river.
At what point does raw sewage enter the river?CorrectIncorrect
Question 17 of 20
17. Question1 point(s)
The bloodworm is found in heavily polluted water.
The diagram shows where raw sewage flows into a river.
Where would there be fewest bloodworms?CorrectIncorrect
Question 18 of 20
18. Question1 point(s)
What describes eutrophication and its effect on a river?CorrectIncorrect
Question 19 of 20
19. Question1 point(s)
Which letter represents the lag phase in the population graph shown?CorrectIncorrect
Question 20 of 20
20. Question1 point(s)
The diagram shows part of the water cycle.
How is water lost from the tree?CorrectIncorrect