Impact of population growth and natural hazards on biodiversity

1

What is biodiversity?

2

What is a person’s ecological footprint?

3

Which description of intensive farming is correct?

4

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

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?

Foodchain. At bottom are algae, they are consumed by mayfly nymphs.  The mayfly nymphs are consumed by sunfish which in turn are eaten by the great blue heron.

6

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

7

Which graph shows the general effect of deforestation on biodiversity?

8

What is the general effect of natural hazards on biodiversity?

9

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

10

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