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Unit 1: Unity and diversity
===In this unit students study the activities of cells and their structure and function at light and electron microscope levels. The composition of cells and cell replication is linked to type, cell growth and size division. The transport processes across plasma membranes is investigated. Common requirements of living things including energy, nutrients and exchanging gases are studied. Students are encouraged to conduct practical investigations including their own design to assist them to develop knowledge and understanding and to illustrate concepts. ===