Unit 3 food production

Question 1

An increase in human population need

Answer 1

An increase in food yeild

Question 2

Fertilsers

Answer 2

Chemicals added to soil to improve plant growth

Question 3

Pesticide

Answer 3

Chemicals that kill plants nad animals which reduce crop yeild

Question 4

What do fertilisers don’t

Answer 4

Fertilisers provide chemicals such as nitrates

Nitrates are used to produce amino acids which are sythesized into plant proteins

Question 5

Why do plants need amino acids from plants and animals

Answer 5

Protein synthesis

Question 6

Problems with fertilises

Answer 6

Fertilisers leach into fresh water adding extras, unwanted nitrates

This causes algal blooms

Algal blooms reduce light levels, killing aquatic plants and animals

The deed plants become food for bacteria, which increase in poulation reducing oxegen for other animals

Question 7

Probelmwith pesticides

Answer 7

Pesticides sprayed onto crops can accumulate in the bodies of organisms over time

As they are passes along a food chain, toxicity increases and can reach lethal levels

Question 8

Bioaccumulation

Answer 8

The build up of toxic substances in a living organism