Activities
Explain natural selection - model answers
This page shows suggestions of model answers for the activity Explain natural selection activity on the page Variation & overproduction These illustrate good students answers and are great for marking,...
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C4.1 Populations & communities
Theme C - Interaction and interdependence & Level 4 - Ecosystems This topic provides lots of opportunity for ecological practical work, including random quadrat sampling and capture-mark-release-recapture. ...
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D4.1 Natural selection
Theme D - Continuity and change & Level 4 - Ecosystems This topic explores the process of evolution by natural selection. It includes the different types of selection, stabilizing, directional and disruptive...
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A4.1 Evolution & speciation
Theme A - Unity and diversity & Level 4 - Ecosystems This topic explores the processes of evolution by natural selection. It goes on to look at speciation and gene pools including the Lotka volterra equation....
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A4.2 Conservation of biodiversity
Planning sheet for topic A4.2 Conservation of biodiversity Theme - Theme A - Unity and diversity- Ecosystems This topic explores the concept of biodiversity, it helps students to make comparisons to...
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B4.2 Ecological niches
Theme B - Form and function & Level 4 - Ecosystems This topic explores the meaning of the term ecological niche with a focus on oxygen tolerance and modes of nutrition. Students are introduced to the...
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C4.2 Transfers of energy
Theme C - Interaction and interdependence & Level 4 - Ecosystems This topic explores the flow of energy (and matter) in food chains, through trophic levels. It covers the roles of photoautotrophs and...
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D4.2 Stability & change
Theme D - Continuity and change & Level 4 - Ecosystems This topic explores the need for stability for continuity of ecosystems. There is a requirement of an input of energy, usually from the sun, but...
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D4.3 Climate change
Theme D - Continuity and change & Level 4 - Ecosystems This topic covers the consequences of climate change, the idea that habitats will change, positive feedback will ultimately speed up the rate of...
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B3.1 Gas Exchange
Planning sheet for topic B3.1 Gas Exchange Theme - Form & function - Organisms This topic explores the concepts of gas exchange surfaces and how they are adapted. In particular, the human lungs are...