Topic 4 - Agricultural Solutions

Question 1

What are the two agricultural solutions mentioned for coping with the demands of a growing human population?

Answer 1

1) Fertilisers
2) Biological control

Question 2

What nutrients do fertilisers provide to plants?

Answer 2

Nitrates and phosphates

Question 3

What is the effect of fertilisers on plants?

Answer 3

Makes them more resistant to environmental conditions and enables faster and larger growth

Question 4

What can happen to excess fertiliser that runs off into rivers?

Answer 4

It can kill fish and other wildlife and affect biodiversity

Question 5

What is biological control?

Answer 5

The use of certain species to control the population of other species

Question 6

Give an example of a species used in biological control.

Answer 6

Aphelinus abdominalis, the aphid killer wasp

Question 7

What does the aphid killer wasp control?

Answer 7

Aphid populations

Question 8

What do aphids feed on?

Answer 8

Fruit crops

Question 9

What is a consequence of using biological control?

Answer 9

It reduces biodiversity

Question 10

True or False: Using fertilisers always benefits the ecosystem.

Answer 10

False

Question 11

Fill in the blank: Biological control is the use of certain species to control the _______ of other species.

Answer 11

population