Farming

Question 1

Removing pest species?

Answer 1

Simplify food webs (monoculture)
Chemical pesticides
Insecticides= kill insect pests (reduces NPP of crops)
Herbicides= kill weeds (reduces NPP of crops)
Biological agents= biological control

Question 2

Limitations of removing pest species?

Answer 2

Lack of biodiversity
Bioaccumulation

Question 3

How to reduce energy loss through respiration?

Answer 3

Carefully controlling the conditions the livestock are raised in -> energy lost via respiration is minimised and the energy available to growth is maximised

Question 4

Reducing energy loss through respiration: keeping livestock in pens?

Answer 4

Their movement is restricted so it lowers energy loss through respiration.

Question 5

When is respiration rate increased?

Answer 5

When animals need to generate body heat to keep warm so keeping livestock indoors and in heated pens lowers energy loss through respiration

Question 6

Reducing energy loss through respiration: chemical energy as biomass?

Answer 6

Ensures more chemical energy is stored as biomass increasing the net production -> means more energy is available for human consumption
A greater amount of food can be produced at a lower cost

Question 7

GM?

Answer 7

Individuals with desired traits like: fast growth rate, high meat/milk production, large crop yield, breeds over multiple generations