, where Home Members Join Sitemap Blog. The index of diversity of a community can be calculated using the formula below: Humans are the biggest cause of loss of diversity in communities, which can inevitably lead to extinction. An index of diversity describes the relationship between the number of species in a community and the … Biodiversity, Evolution and Disease Free timetable app ← Back to Library. Please enable JavaScript. Get Started. Generic name. For example, counting the number of different hair colours in a population would indicate the number of different alleles for hair colour. The balance between conservation and farming. n The term habitat refers to the range of physical, biological and environmental factors in which a species can live in. AQA A Level Biology Gandhi Milan 2020-01-09T19:02:44+00:00. Questions organised by topic & past papers. Farming techniques in particular reduce biodiversity. ( Contains both PDF and editable Microsoft Publisher version. An index of diversity describes the relationship between the number of species in a community and the number of individuals in each species. The A Level Cambridge topics are: Energy and Respiration; Photosynthesis; Homeostasis; Coordination; Inherited Change; Selection and Evolution; Biodiversity, Classification, and Conservation; Genetic and Biotechnology; Inherited Change. ) Designed for the AQA A Level Biology syllabus. Everything you need to know about Biodiversity & Investigating Diversity for the A Level Biology AQA exam, totally free, with assessment questions, text & videos. n An index of diversity combines both the number of different species and the population size of each within a community. Free timetable app ← Back to Library. If there was a wide variety of hair colours this would indicate a wide range of alleles and therefore a high genetic diversity. Ignored words will never appear in any learning session. Topic Questions. N For example deserts and arctic regions naturally have low a biodiversity due to the harsh environment. Extinction of habitats, plants and animals could reduce tourism and therefore impact the economy. Check out Adapt — the A-level & GCSE revision timetable app. = Everything you need to know about Biodiversity for the A Level Biology OCR exam, totally free, with assessment questions, text & videos. Removal of these habitats also removes food sources for animals. AQA Biology AS, Biodiversity. Home Library Revision Timetable. and The more species there are the richer the area is in species. Home Members Join Sitemap Blog. AQA is not responsible for the content of external sites. Biodiversity can relate to a range of habitats, from a small local habitat to the Earth. PLAY. 1 Extinction of species is negative for many reason ranging from ethical, economical and medicinal. AQA A Level Biology. = total number of organisms of each species. Resources. N ... Biodiversity Learn these words 18 words 0 ignored Ready to learn Ready to review Ignore words. Σ A Level Biology AQA View topics (32) Topics. Please either accept the cookies, or, Specifications for first teaching in 2015, 3.3 Organisms exchange substances with their environment, 3.4 Genetic information, variation and relationships between organisms, 3.5 Energy transfers in and between organisms (A-level only), 3.6 Organisms respond to changes in their internal and external environments (A-level only), 3.7 Genetics, populations, evolution and ecosystems (A-level only), 3.8 The control of gene expression (A-level only), Mathematical requirements and exemplifications. Past Papers. AQA A Level Biology. taxa, each group is a taxon. Firstly, if humans are the cause of extinctions it is our moral duty to put measures in place to try and prevent this. - © AQA 2020, This website uses cookies to improve your experience. A Level Biology OCR View topics (18) Topics. A Level Biology. STUDY. Students could be given data from which to calculate an Learn vocabulary, terms, and more with flashcards, games, and other study tools. Genetic information, variation and relationships between organisms (AQA AS Biology) PART 6 of 6 TOPICS TOPICS: DNA, genes and chromosomes Genetic diversity can arise as a result of mutation or meiosis Genetic diversity and adaptation Species and taxonomy Biodiversity within a community Investigating diversity Investigating diversity: Investigating diversity enables comparisons […] Mark schemes. ) index of diversity and interpret the significance of the calculated d value of the index. The genetic diversity of a population or community is the measure of how many different alleles there are for each gene. Topic Questions & Mark Schemes. This is a measure of the number of different species in a community. This could be structural differences (between a tree and an ant) or functional […] Finally, many medicines have been based on chemicals naturally occurring in plants so plant species going extinct could have potentially held the molecules needed to cure diseases in humans. Carbohydrate Questions Lipids Questions ... Biodiversity Questions Investigating Diversity Questions Past Papers. To ensure your sample is representative of the population you must take a large sample and to avoid bias you should randomly sample. When measuring variation within a population samples are taken. This is because it would be too time consuming and potentially impossible to record data on every individual within a population. It is therefore essential to put in place conservation measures to protect these habitats, but not to an extent that farming is no longer possible and humans run out of food. Past papers. - ( A revision mind map covering the ‘Biodiversity’ section of the AQA AS/A Level Biology (7401/7402) specification.