This document contains a 31 question quiz on ecosystems and ecology. It covers topics like defining populations and communities, describing abiotic factors and food chains, explaining concepts like primary productivity, succession, nitrogen fixation, and carrying capacity. It also addresses population growth models, competition between species, conservation management strategies, and threats to biodiversity from human activities.
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1. A2 OCR Biology
UNIT 2 – Module 3
Ecosystems – Revision Quiz
Total: ____ / 50
____ %
Scan this QR code with your
smartphone to take you the relevant
section of mrexham.com
2. 1. Define the term population (1)
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2. Define the term community (1)
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3. What term would you use to define the role each species plays in
an ecosystem? (1)
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4. List three abiotic factors that can affect an ecosystem (2)
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.....................................................................................................................
5. What type of organisms feed on waste material or dead
organisms? (1)
.....................................................................................................................
6. What term describes the level at which an organism feeds in a
food chain? (1)
.....................................................................................................................
7. Where does all the energy in a food chain initially come from? (1)
.....................................................................................................................
3. 8. Name three types of pyramid that can be used to represent a food
chain (3)
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9. What units do you use for productivity? (1)
.....................................................................................................................
10.Define the term Net Primary Productivity (2)
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11.Give three ways to improve primary productivity? (3)
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12.Give two ways of improving secondary productivity? (2)
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13.Define the term succession (1)
.....................................................................................................................
4. 14.What term is used to describe the species that first colonise a new
habitat? (1)
.....................................................................................................................
15.What term is used to describe the final stage of succession? (1)
.....................................................................................................................
16.Name three plants that are involved in sand dune succession (3)
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17.What is a saprotroph (1)
.....................................................................................................................
18.What is the name of the nitrogen fixing bacteria that live in root
nodules? (1)
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19.What type of relationship do they have with the plant? (1)
.....................................................................................................................
20.What type of bacteria cause nitrification? (1)
.....................................................................................................................
21.What process is it when the ammonium gets converted to
nitrites? (1)
.....................................................................................................................
5. 22.Define the term carrying capacity (2)
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23.Name two techniques used to manage small scale timber
production (2)
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24.What type of organisms tend to adopt the r-strategy for
population growth?(1)
.....................................................................................................................
25.What happens at the log phase of population growth (2)
.....................................................................................................................
.....................................................................................................................
26.Define the term intraspecific competition (1)
.....................................................................................................................
27.What idea did Gause form about interspecific competition (1)
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6. 28.What are the three principals for managing large scale timber
production (3)
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29.Give three examples of management strategies used in
conservation (3)
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30.Give two ways the human population has threatened biodiversity
(2)
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31.Give the three species introduced by humans to the Galapagos
islands (3)
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END OF TEST