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Schemes of Work
QCA

Science at key stage 3    (Year 7)

Unit 7A: Cells
Section 8: a. How are new cells made?

QCA

Objectives

Children should learn:
  • that cells can make new cells by dividing
  • that growth occurs when new cells are made and increase in size
  • that cell division begins with division of the nucleus

Activities

Outcomes

Children:
  • Ask pupils how they think new cells are made, and discuss different ideas that may arise.
  • Provide plant material to illustrate active cell division, eg filamentous green algae, budding yeast, broad bean roots, for microscope examination under low magnification. Ask pupils to suggest how they might identify cells that are making new cells, and to locate and identify cells that may have recently divided, giving reasons.
  • Using these observations and secondary sources of evidence, eg photographs or video images of dividing cells, help pupils to sequence photographs of cell division. Prompt them with questions, eg Why does the nucleus divide first? Consolidate by providing pupils with diagrams of the same process to sequence and annotate.
  • explain that growth of living things occurs by cells dividing to make new cells, and these cells increasing in size
  • represent the process of cell division as a sequence that begins with division of the nucleus

Points to note

  • Check plant material before the lesson to ensure examples of dividing cells can be observed. Filamentous green algae collected from a pond provide evidence of recently divided cells, about half the size of the typical cell in the filament.
  • As an alternative, use prepared slides which show dividing cells.
  • Details of cell division are not required. Mitosis forms part of the key stage 4 programme of study.

Sections in this unit

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This unit is divided into sections. Each section contains a sequence of activities with related objectives and outcomes. You can view this unit by moving through the sections or print/download the whole unit.
1. What are living organisms made from?
2. a. How can using a microscope give us information about structure?
3. b. How can using a microscope give us information about structure?
4. What are cells like?
5. Checking progress
6. a. What do cells do?
7. b. What do cells do?
8. a. How are new cells made?
9. b. How are new cells made?
10. What causes pollen tubes to grow?
11. Reviewing work