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Examples What does the term biodiversity mean? Community Niche What does the phrase abiotic factor mean? Biome Define the terms. Biodiversity and the Distribution of Life Equation for an ecosystem. Ways humans impact the environment. Give a short description of each. Describe the effect of grazing on plant biodiversity. How does acid rain form? Describe the effect of an increase in water temperature on biodiversity. Air pollution. Deforestation. Desertification. Name processes 1, 2 and 3, from the Nitrogen Cycle. 1 Explain the difference between intraand inter- specific competition. 3 Explain why most food chains are 4 (or less) organisms in length. 2 2 Energy in Ecosystems Name the type of organisms which carry out the process in the Nitrogen Cycle. Draw or describe a pyramid of numbers. Three ways in which energy can be lost from a food chain/web. Give the meanings of the following terms. Producer. Give 2 reasons why a pyramid of numbers may have an irregular shape. Consumer. Decomposer. Diagram showing process of speciation. Two types of isolation barrier and two examples of each. Biological definition of a species. Sampling Techniques/ Adaptation, Natural Selection and Evolution Give one way errors may be minimised when using… Define the term mutation. PITFALL TRAPS QUADRAT pH METER LIGHT METER Explain the “adaptive significance” of woodlice moving to dark/damp areas in a choice chamber. One example of a physiological adaptation (and its function) in a desert rat… Give three examples of mutagenic agents. Two examples of structural adaptations (and their function) in… POLAR BEARS Decomposer. CACTI What is a monoculture? Give one advantage and one disadvantage of a monoculture. What is biological control? Give an example. What is an indicator species? Human Impact on the Environment What is bioaccumulation? Give an example. What are pesticides? Describe the problems associated with leaching. Four essential plant nutrients, the role and deficiency symptoms of each. Substance added to soil to improve nutrient levels. ADVANTAGE DISADVANTAGE DISADVANTAGE DISADVANTAGE