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Unit 1. Darwin’s big ideas and ways of working. Darwin’s big ideas and ways of working: Unit 1. Darwin’s big ideas and ways of working: Unit 1. High ratio of increase and Struggle for life. Darwin’s weed patch experiment. Darwin’s big ideas and ways of working: Unit 1.
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Unit 1 Darwin’s big ideas and ways of working Darwin’s big ideas and ways of working: Unit 1 Darwin’s big ideas and ways of working: Unit 1
High ratio of increase and Struggle for life Darwin’s weed patch experiment Darwin’s big ideas and ways of working: Unit 1 Darwin’s big ideas and ways of working: Unit 1
Eggs or very young animals seem generally to suffer most because they are competing with established organisms High ratio of increase and Struggle for life http://www.arkive.org/common-frog/rana-temporaria/image-A8918.html http://www.arkive.org/robin/erithacus-rubecula/image-A9289.html Darwin’s big ideas and ways of working: Unit 1
Inheritance and variability Pollination - bees transfer pollen and pollen carries the potential for variability in plants Darwin’s big ideas and ways of working: Unit 1
Darwin grew 54 varieties of the Cabbage family in his kitchen garden Inheritance and variability Darwin’s big ideas and ways of working: Unit 1
Making Connections What is the connection between these organisms? Bumble bee Red clover Cats Field Mouse Darwin’s big ideas and ways of working: Unit 1
Darwin made collections and noticed the variability amongst the individuals he collected Inheritance and variability Darwin’s big ideas and ways of working: Unit 1
Life Cycles Seed to seed Some don’t survive even in a pod Darwin’s big ideas and ways of working: Unit 1
Divergence of Character List 5 ways in which dogs show divergence of character. Darwin’s big ideas and ways of working: Unit 1
Creating Models Darwin’s big ideas and ways of working: Unit 1
Extinction of less-improved forms • ‘the same genera and species [of fossil plants] are found in the most remote regions where the plants now in existence are entirely different.’ • (Darwin’s notebook on the transmutation of species) • Endangered species appear on the Red List e.g. Wild horse • http://www.arkive.org/przewalskis-horse/equus-ferus-przewalskii/description.html Darwin’s big ideas and ways of working: Unit 1
Extinction of wildlife occurs today because of: • Habitat degradation – clearing for housing/roads/mining • Human activities including hunting • Competition with domestic livestock/crops • Global warming • Flooding • Pollution – air, water, soil Darwin’s big ideas and ways of working: Unit 1