Curriculum
Course: AQA A Level Biology 7402
Login

Curriculum

AQA A Level Biology 7402

1. Biological Molecules

0/102

2. Cell Structure

0/95

3. Exchange and Transport

0/98

4. Genetics, Variation and Interdependence

0/94

5. Energy Transfers In and Between Organisms (A Level only)

0/63

6. Organisms Respond to Changes in their Environments (A Level only)

0/93

7. Genetics, Populations, Evolution and Ecosystems (A Level only)

0/55

8. The Control of Gene Expression (A Level only)

0/72

9. Exam Guidance and Skills

0/38
Quiz

5.3.7 Primary and Secondary Productivity – Exam questions

Submit quiz
Once you submit, you will no longer be able to change your answers. Are you sure you want to submit the quiz?
Cancel Submit
  • Questions count: 8
  • Passing grade: B+
Start Quiz
1.
Which statement best describes Net primary productivity?
The total dry mass of living material at a trophic level.
Eats plants / eats animals / eats both.
Makes its own food from inorganic sources — photosynthesis or chemosynthesis.
GPP minus the energy producers use in respiration — what is available to consumers.
2.
Which statement best describes Gross primary productivity?
Building food using energy from chemical bonds, not light — deep-sea vent bacteria.
All the interconnected chains in a community.
Total energy fixed by producers.
The total dry mass of living material at a trophic level.
3.
Producers fix 12 000 kJ (GPP) and use 4 500 kJ in respiration. What is the net primary productivity?
16 500 kJ
7 500 kJ
4 500 kJ
12 000 kJ
4.

Gross primary productivity (GPP) is

the energy lost in respiration
the energy passed to consumers
the mass of producers
the rate at which energy is incorporated into organic molecules by producers
5.

Net primary productivity is

GPP plus respiration
energy absorbed by the leaf
GPP minus respiratory losses
energy in decomposers
6.
How does primary succession differ from secondary succession?
SAT Biology - Question 068
A
B
C
D
E
7.
Calculate the percentage transfer efficiency from primary to secondary consumers in this measured ecosystem.
6.7%
85%
15%
1.5%
8.
Secondary succession is usually faster than primary succession because soil is already present. True or false?
True
False
False, primary is faster
True only in deserts
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
Part of 5. Energy Transfers In and Between Organisms (A Level only) — see every lesson and quiz in this unit.
Accepted payment methods