Impact of population growth and natural hazards on biodiversity test questions

1

What is biodiversity?

A high number of different species in an ecosystem

The number of different species in an ecosystem

A low number of different species in an ecosystem

2

What is a person’s ecological footprint?

How much land they would require to supply their resources

How much land they would require to remove their waste products

How much land they would require to supply their resources and remove their waste products

3

Which description of intensive farming is correct?

Farming that involves the cultivation of many different species of plants

Farming that increases the crop yield of an area of land

Farming that has minimal impact on the environment

4

Weeds compete with crop plants for nutrients, water and light. How do farmers reduce this competition for resources?

Fertilisers

Pesticides

Indicator species

5

A pesticide accumulates in the bodies of organisms in the food chain shown below. In which organism will the highest concentration of the pesticide be found?

Algae

Great blue heron

Sunfish

6

What happens to the toxicity of a pesticide in the bodies of the organisms at higher levels in a food chain?

Decreases

Increases

Stays the same

7

Which graph shows the general effect of deforestation on biodiversity?

Deforestation graph A. On the y axis is number of species present. The x axis is level of deforestation. The plotted line begins a short way up the y axis and travels upwards at a 45 degree angle.

Deforestation graph B. On the y axis is number of species present. The x axis is level of deforestation.

Deforestation graph C. On the y axis is number of species present. The x axis is level of deforestation. The line starts high up the y axis and falls at a 45 degree angle.

8

What is the general effect of natural hazards on biodiversity?

Decreased biodiversity

Increased biodiversity

Biodiversity unaffected

9

Which of the following is a method of conservation of endangered species?

Captive breeding

Intensive farming

Pharming

10

Which of the following is an example of a natural hazard?

Acid rain

Forest fire

Oil spill