AQA A-Level Environmental Science 3.5 Biological resources overview quiz quiz

Applying fertilisers and using high-yield crop varieties

Stripping nutrients out of the soil so that fewer crops can be grown each season

Leaving all available land permanently fallow

Reducing irrigation across dry areas

Depletion of the stratospheric ozone layer

Eutrophication of waterways

Acid rain forming downwind

Salinisation of soils

It maximises yield by relying heavily on artificial fertilisers, sprayed pesticides and growth hormones

It uses only genetically modified high-yield crops

It avoids artificial fertilisers and pesticides, relying on natural methods

It abandons crop rotation entirely

The total number of fish present in the sea at any one moment in time

The maximum quantity a single fishing boat can physically hold in its hold

The catch allowed only during the breeding season

The largest catch that can be taken repeatedly without reducing the stock

Using catch quotas and net mesh-size limits

Removing all catch limits so that boats can land as much as they are able to

Concentrating fishing effort during breeding seasons

Using the smallest possible net mesh size

It always eliminates the need for any wild fish to be caught for feed at all

Waste and chemicals can pollute the surrounding water

It reduces the total global supply of food

It is unable to spread disease to wild fish populations

Providing valuable timber that can be harvested and sold for profit

Supporting the tourism industry

Storing carbon and regulating the water cycle

Supplying fuelwood for sale

Building roads through the forest interior

Collecting medicinal plants from the understorey

Low-impact ecotourism

Clearing land for agriculture

It releases stored carbon and reduces future carbon uptake

It thickens the stratospheric ozone layer and shields the surface from heat

It cools the lower atmosphere directly

It has no measurable effect on atmospheric carbon dioxide

Clear-felling whole forests in a single operation

Selective logging and replanting

Removing all replanting programmes to cut costs

Converting all the forest to farmland

Intensive monoculture cropping

Clear-felling of woodland

Integrated pest management

Bottom trawling

Because they never reproduce once they reach adulthood in the open sea

Because their populations are completely unaffected by the level of fishing

Because they grow faster the more are caught

Because they renew only if caught at or below the maximum sustainable yield