Food production - Unit 3 Flashcards

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1
Q

What chemical does fertilisers provide plants and what do plants do with it

A

Nitrates, they build amino acids into proteins

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2
Q

Algal blooms.

A

-Fertilisers leach into freshwater due to rainfall
-Increase the growth of algae in the water
-algae blocks most of the sunlight from reaching the water plants at the bottom of the body of water
-Plants die as they cannot produce their own food from photosynthesis
-They become food for bacteria
-Bacteria divides and take up most of the oxygen in the water
-decrease in biodiversity as the water animals have no oxygen and they die

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3
Q

What are two alternatives to pesticides ?

A

-Biological control
-Genetically modified crops

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4
Q

What are pesticides used for ?

A

Killing plants or animals which are affecting crop yield.

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5
Q

Pesticides sprayed on crops can accumulate in the bodies of living organisms over time, reaching lethal levels. What is this called?

A

Bioaccumulation

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6
Q

What is biological control ?

A

Using living things to control pests

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