Topic 20: Human Impact

Question 1

Agricultural machinery

Answer 1

Has replaced humans and improved efficiency due to the ability to farm much larger areas of land

Question 2

Insecticdes and herbicides

Answer 2

These chemicals kill off unwanted insects and weed species meaning that there is less damage done to plants and fruit loss to insects as well as reducing competitoon form other plant speciecs.

Question 3

Chemical fertlisers improve yields

Answer 3

fertalisers increase the amount of nutrients in the soil for plants meaning that they can grow larger and produce more fruits.

Question 4

Selective breeding.

Answer 4

animals and crop plants which produce a large yield are selectively bred to produce breed that reliably produce high yields.

Question 5

Monoculture farming

Answer 5

On a given area of agricultural land only one type of crop is grown

Question 6

Biodiversity

Answer 6

The number of specieces that live in a particluar area.

Question 7

Sustainable development

Answer 7

Development providing for the needs of an increasing human populatiob without harming theenvironmet.