Chapter 1: Cell Biology
Lesson 11: Key concept: Cell development Lesson overview AQA specification reference AQA 4.1.2
Learning objectives • Give examples of where mitosis is necessary to produce identical daughter cells. • Understand the need for reduction division, meiosis. • Describe the use and potential of cloned cells in biological research.
Learning outcomes • Make links between cell structure, cell division and stem cells. [O1] • Describe the process of mitosis. [O2] • Compare the use of meristems in cloning with animal cell cloning. [O3]
Skills development • WS 1.2 Use models to solve problems, make predictions and to develop scientific explanations and understanding of familiar and unfamiliar facts. • WS 1.4 Explain everyday and technological applications of science. • WS 4.1 Use scientific vocabulary, terminology and definitions. Resources needed Worksheet 1.11.1 (low and standard demand); Worksheet 1.11.2 (high demand) Digital resources Presentation 1.11 Key vocabulary differentiation, gamete, meiosis, mitosis, placenta, zygote
Teaching and learning Engage • Ask students to work in pairs to make a word wall on poster paper. They should split the paper into four sections. On each of the sections they should discuss and write down all the words relating to animal cells, plant cells, cell division and cloning, respectively. [O1] • Students should join another pair and compare the words on their posters. Discuss and check students’ ideas as a class and ask them to add in any omissions. [O1]
Challenge and develop • Model the process of mitosis by gently blowing into a solution of bubbles. New bubbles are made from the original ones. Discuss the idea of cell growth, establishing that it occurs by the formation of new cells, and not simply the enlargement of old ones. [O2] • Show students the image from the PowerPoint asking what mitosis is. Discuss the images and show students some cells that are actively carrying out mitosis. Discuss what the cells and doing and help students to identify the meaning of mitosis. [O2] • Low and standard demand students should read the first section from the Student Book (pages 34–35) or use the PowerPoint slides to discuss how cells divide by mitosis. Students should answer questions 1 and 2 from Worksheet 1.11.1. [O2] • Check students’ ideas using the PowerPoint slide. [O2] • High demand students should read the section on cell division in the Student Book. Students should answer the questions on Worksheet 1.11.2. [O2]
AQA GCSE Biology: Trilogy: Teacher Pack
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