ZIMSEC O-Level Biology
8.10.1Ecosystems
Ecosystems in ZIMSEC O-Level Biology: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic21 practice questions1 lesson
Overview
Form 3.
Learning objectives
What the syllabus expects you to be able to do.
- 8.10.1.1Define an ecosystem and list its physical and biological components.
- 8.10.1.2Describe the role of soil in ecosystems, its biological components (litter, earthworms, nematodes, termites, fungi, bacteria, humus) and their functions.
- 8.10.1.3Compare clay, loam and sandy soils by experiment (particle size, aeration, water-holding capacity, drainage, leaching, pH).
Lessons
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Ecosystems and soil
25 min
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Sample question
A sample question on this topic. Answer it, check it, then read the worked answer.
Exam style
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