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Download National 5 Biology Unit 3: Life on Earth Key Area 1: Biodiversity
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Transcript
National 5 Biology Unit 3: Life on Earth Key Area 1: Biodiversity & Distribution of Life Traffic light the following statements using red/ yellow/ green I can state what makes up an ecosystem. I can provide examples of biotic and abiotic factors. I can describe how biotic and abiotic factors can affect the biodiversity in an ecosystem. I can describe how human activities can have an impact on biodiversity. I can define a biome. I can describe the characteristics of several types of biome. I can describe how distribution of biomes is affected by temperature and rainfall. I can state the meaning of an organism’s niche within its community. Key Area 2: Energy in Ecosystems Traffic light the following statements using red/ yellow/ green I can state that 90% of energy is lost at each level of a food chain. I can describe how this energy is lost from a food chain. I can describe and produce diagrams to show a pyramids of biomass, energy and numbers. I can state that animal and plant proteins are produced using nitrogen from nitrates. I can describe the roles of nitrifying, denitrifying, root nodule and free living bacteria. I can describe how decomposers convert nitrogenous waste to ammonium compounds, nitrites and nitrates. I can state that interspecific competition occurs between individuals from different species for similar resources. I can state that intraspecific competition occurs between individuals from the same species for the same resources. Key Area 3: Sampling Techniques Traffic light the following statements using red/ yellow/ green I can describe how to use a pitfall trap to sample animals. I can describe how to use a quadrat to sample plants or very slow moving animals. I can know how to measure the temperature, pH, moisture levels and light intensity of an ecosystem. I can describe the limitation and sources of error for a variety of sampling techniques. Key Area 4: Adaptation & Natural Selection Traffic light the following statements using red/ yellow/ green I can state what a mutation is and that it is a source of variation. I can give examples of environmental factors that can increase mutation rates. I can state that mutations can be neutral, or cause an advantage/disadvantage. I can state that variation within a population allows evolution over time. I can describe the process of natural selection. I can describe how mutations and natural selection leads to speciation. Key Area 5: Human Impact Traffic light the following statements using red/ yellow/ green I know that an increasing population needs an increasing food yield. I can describe the effects of fertilisers leaching into fresh water. I can describe the effects of pesticides on food chains. I can state that indicator species are species that by their presence or absence indicate pollution levels I can describe how biological control and GM crops may be an alternative to fertilisers and pesticides.
