5. Food Production

Question 1

Increasing human population requires

Answer 1

Increased food yield

Question 2

To increase food yield

Answer 2

Fertilisers and pesticides can be used

Question 3

Fertilisers

Answer 3

Provide chemicals such as nitrates which increase crop yield and improve plant growth

Question 4

Nitrates dissolves in soil and is absorbed into plants and produce

Answer 4

Amino acids which are then synthesised into plant proteins

Question 5

Animals consume plants or other animals to

Answer 5

Obtain amino acids for protein synthesis

Question 6

Fertilisers can leach into fresh water causing

Answer 6

Algal blooms

Question 7

Algal blooms lead to

Answer 7

A reduction in light levels, killing aquatic plants

Question 8

Dead plants and algae

Answer 8

Become food for bacteria which then multiply

Question 9

The bacteria

Answer 9

Use up large quantities of oxygen, reducing the availability for other organisms

Question 10

Pesticides are used to

Answer 10

Kill plants and animals that reduce crop yield

Question 11

Pesticides sprayed onto crops

Answer 11

Can accumulate in the bodies of organisms over time known as bioaccumulation

Question 12

Pesticides are passed along food chains and

Answer 12

Toxicity increase and can reach lethal levels

Question 13

Biological control

Answer 13

Is an alternative to pesticides where a natural predator is used to control the population of the ‘pest’

Question 14

Genetically modified crops

Answer 14

Can be used as an alternative to fertilisers