MCQ-2: 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 diagram shows a population pyramid for a city.
What feature of the population is shown in the diagram?CorrectIncorrect
Question 2 of 20
2. Question1 point(s)
What are the possible effects of deforestation?
loss of soil flooding decrease in atmospheric
A ✓ ✓ x B ✓ x ✓ C x ✓ x D x x ✓CorrectIncorrect
Question 3 of 20
3. Question1 point(s)
A farmer put some fertiliser on his field. Soon afterwards, there was a heavy storm and some of the fertiliser drained into a lake.
What is the effect of the fertiliser on the growth of the crop plants in the field and the plants in the lake?
crop plants lake plants A decrease growth decrease growth B decrease growth increase growth C increase growth decrease growth D increase growth increase growthCorrectIncorrect
Question 4 of 20
4. Question1 point(s)
In 2005, fifteen mice were set free on an island where mice had never lived before. The table shows how their population changed over the next three years.
2005 15 2006 62 2007 237 2008 965
What caused the population change shown in the table?CorrectIncorrect
Question 5 of 20
5. Question1 point(s)
What is reduced when untreated sewage is released into rivers?CorrectIncorrect
Question 6 of 20
6. Question1 point(s)
The diagram shows a food chain.
A farmer sprays his cabbages with pesticide.
Which organisms does the farmer want to kill?CorrectIncorrect
Question 7 of 20
7. Question1 point(s)
Which pollutants of water can lead to eutrophication?
fertilisers herbicides insecticides sewage A ✓ ✓ x x B ✓ x x ✓ C x ✓ ✓ x D x x ✓ ✓CorrectIncorrect
Question 8 of 20
8. Question1 point(s)
What is an effect of pollution by nuclear fall-out?CorrectIncorrect
Question 9 of 20
9. Question1 point(s)
The table shows the birth rates and death rates in four countries.
Which country will double its population most quickly?
/ % population
/ % population
A 5.0 4.0 B 4.5 2.5 C 3.5 2.0 D 3.0 3.0CorrectIncorrect
Question 10 of 20
10. Question1 point(s)
Which two gases both contribute to global warming?CorrectIncorrect
Question 11 of 20
11. Question1 point(s)
Lichens are organisms that do not grow well in air containing sulfur dioxide.
Which graph shows the change in number of lichen species from the centre of an industrial city to the countryside 15 km away?
Question 12 of 20
12. Question1 point(s)
The graph shows how the population of the world has increased from 1650 until the present day.
What stage in the sigmoid population growth curve is represented by region P?CorrectIncorrect
Question 13 of 20
13. Question1 point(s)
Which effect is least likely to occur as a result of deforestation?CorrectIncorrect
Question 14 of 20
14. Question1 point(s)
The diagram shows the positions of four farms and the concentrations of nitrate at different points in a river.
Which farm is likely to have been using too much fertiliser on its land?CorrectIncorrect
Question 15 of 20
15. Question1 point(s)
A large amount of herbicide is applied to a field. However, some of the herbicide is washed into a nearby lake.
What is the effect of the herbicide on the weeds in the field and on the plants in the lake?
weeds in field plants in lake A less growth less growth B less growth more growth C more growth less growth D more growth more growthCorrectIncorrect
Question 16 of 20
16. Question1 point(s)
The graph shows the levels of dissolved oxygen and mineral ions in a river.
At which point does raw sewage enter the river?CorrectIncorrect
Question 17 of 20
17. Question1 point(s)
Deforestation can have a negative impact on the environment.
Which statement about the negative impact of deforestation is correct?CorrectIncorrect
Question 18 of 20
18. Question1 point(s)
When nitrates enter a lake they cause rapid growth of algae on the surface of the water. This causes the following changes in the lake:
- a decrease in the concentration of dissolved oxygen in the water
- fish and other aquatic animals die
- an increase in aerobic respiration by decomposers
- producers die and decomposition increases
In which order do these changes occur?CorrectIncorrect
Question 19 of 20
19. Question1 point(s)
What would be unlikely to increase the risk of human famine?CorrectIncorrect
Question 20 of 20
20. Question1 point(s)
Since 1970 sulfur dioxide emissions have dropped by 95% in some parts of the world.
What is the main reason for the reduction in emissions?CorrectIncorrect