MCQ-3: Human Influences on Ecosystems

How does eutrophication lead to the death of aquatic organisms?

What is an example of sustainable development?

What can be managed sustainably?

Large areas of tropical forests have been cleared to grow monocultures of palm oil plants.
Which effect will this have on the ecosystem?

Evidence shows that some aquatic organisms have been feminised.
What is the most likely cause of this?

What is not a reason for using chemical fertilisers in food production?

What is an undesirable effect of deforestation?

The graph shows the growth of a population in a suitable environment.

During which two stages is the population affected by lack of resources as a limiting factor?

What effect does deforestation have on the levels of carbon dioxide, oxygen and water vapour in the atmosphere?

A persistent pesticide is one that does not break down.
What is one disadvantage of a persistent pesticide?

The graph shows the rate of growth for a population of herbivores.
Which is the exponential (log) phase in the growth of this population?

The diagram shows four places on a river, where water samples were taken.

Which graph shows oxygen concentrations in the river?

Different pesticides were tested to see how poisonous they were to fish. Scientists found the concentration of pesticide that killed 50 % of the fish within four days.
The table shows the results of the tests.

Which pesticide was the most dangerous to the fish?

The graph shows the growth of the human population of the world.

Between which years did the population grow fastest?

Which human activity can cause eutrophication of lakes?

Insecticides sprayed in low concentrations may increase the yield of a crop, but may also be harmful to wildlife.
What is an explanation for this?

What is the correct sequence for the stages in a sigmoid population growth curve?

The chart shows which species of different animals are present in rivers of different pH.

Which conclusion can be drawn from this information?

The graph shows the quantities of pesticides that accumulate in four populations, each at different trophic levels in a food chain.
Which population is most likely to be herbivores?

The graph shows part of a growth curve for a bacterial population.

What is missing from the graph?