ZIMSEC O-Level Biology
8.5.2Productivity
Productivity 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.
- 8.5.2.1Define biomass and productivity and explain how light, mineral salts, temperature, water, pests and diseases affect plant productivity.
- 8.5.2.2Identify tissue-eating and sap-sucking pests and plant diseases (such as bacterial wilt and rust), explain how they reduce yields, and describe the advantages and disadvantages of management, cultural, chemical and biological control, with reference to crops such as maize, cotton and tobacco.
Lessons
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Crop productivity, pests and diseases
30 min
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Sample question
A sample question on this topic. Answer it, check it, then read the worked answer.
Exam style
Turn Productivity into a strength.
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