Energy Transfer And Nutrient Cycles

Front 1

Give 3 reasons why not all the chemical energy stored in the consumers' food is not transferred to the next trophic level.Give the equation for calculating the net production of consumers and state what each letter means.

Back 1

Front 2

Give two examples of chemical pesticides and explain how each one reduce pest numbers and increase productivity.

Back 2

Front 3

Give two examples of biological agents and explain how each one reduce pest numbers and increase productivity.

Back 3

Front 4

Describe 2 farming practices that reduce respiratory loss in animals and explain how they increase the productivity and efficiency of energy transfer.Give one benefit and one issue surrounding these farming methods.

Back 4

Hint 4

Front 5

What are saprobionts?How do saprobionts breakdown the remains of dead organic matter?What is this process called?Describe and explain how some fungai form symbiotic relationships with the root of plants(mycorrhizae).

Back 5

Front 6

Describe and explain how some fungai form symbiotic relationships with the root of plants(mycorrhizae).

Back 6

Front 7

What does the nitrigen cycle show?What are the 4 processes taking place in nitrogen cycle?

Back 7

Hint 7

Front 8

What is nitrogen fixation?How is it carried out by bacteria?What other ways can nitrogen be fixated in an ecosystem?

Back 8

Hint 8

Front 9

What is ammonification

Back 9

Hint 9

Front 10

What is Nitrification and how is it carried out?

Back 10

Hint 10

Front 11

What is dentrification?

Back 11

Hint 11

Front 12

What does the phosphorus cycle show?Describe it.

Back 12

Front 13

Explain the environmental issues of using fertilisers. Why are inorganic ions in chemical fertilisers more likely to leach than organic fertilisers? Why are phosphate ions less likely to leach than nitrates?

Back 13

Front 14

Describe the process of eutrophication.

Back 14