Ecology and Ecosystem GCE Revision Questions Biology o level

Ecology and Ecosystem GCE Revision Questions Biology

1. (a) Describe the nitrogen cycle

(b) Distinguish between the following

• Food chains and Food webs.
• Mutualism and Commensalism

2. What is an ecosystem? Explain the role of

(a) Producers

(b) Consumers

(c) Decomposers within a named ecosystem.

(d) Indicate by means of a diagram the flow of energy through an ecosystem.

3. (a) Distinguish carefully between

• Food chains and food webs
• Symbiosis and parasitism

(b) Explain why the use of plant products by man to feed other animals, which he uses for food, is wasteful. 

4. (a) Describe how atmospheric nitrogen is converted to soil nitrogen for plant use.

(b) Why is nitrogen necessary in plants? what effect does lack of nitrogen have on flowering plants?

5. (a) State the importance of nitrogen to living organisms.

(b) How is carbon dioxide-

• Added to 
• Removed from the atmosphere

6. (a) Define the terms 

• Ecosystem
• Environment

(b) How do the activities of the various activities contribute to the maintenance of organic and inorganic substances?

(c) Why is bush burning harmful to the ecosystem.

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Revision questions biology ordinary level for Students.

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Use of Biology revision questions. 

Above questions are revision questions for "Ecology and Ecosystem" for ordinary level (o level). 

Candidates can use the above questions to prepare for the Cameroon General certificate of examination board GCE 

The questions are not only for Cameroonians preparing for the gce but they are revision questions for all students world wide preparing for the GCE or any other Examination.