This lesson discusses how biodiversity may be considered at different levels and describes how to calculate Simpson’s Index of diversity. The PowerPoint and accompanying worksheets have primarily been designed to cover points 4.2.1 (a, c and d) of the OCR A-level Biology A specification but also make links to the upcoming topics of classification, natural selection and adaptations
A quiz competition called BIOLOGICAL TERMINOLOGY SNAP runs over the course of the lesson and this will engage the students whilst challenging them to recognise species, population, biodiversity, community and natural selection from their respective definitions. Once biodiversity as the variety of living organisms in a habitat is revealed, the students will learn that this can relate to a range of habitats, from those in the local area to the Earth. Moving forwards, the students will begin to understand that biodiversity can be considered at a range of levels which include within a habitat, within a species and within different habitats so that they can be compared. Species richness as a measure of the number of different species in a community is met and a biological example in the rainforests of Madagascar is used to increase its relevance. However, students will also be introduced to species evenness and will learn that in order for a habitat to be deemed to be biodiverse, it must be both species rich and even. The students are introduced to an unfamiliar formula that calculates the heterozygosity index and are challenged to apply their knowledge to this situation, as well as linking a low H value to natural selection. The rest of the lesson focuses on the calculation of Simpson’s Index of diversity and a 4-step guide is used to walk students through each part of the calculation. This is done in combination with a worked example to allow students to visualise how the formula should be applied to actual figures. Using the method, they will then calculate a value of D for a comparable habitat to allow the two values to be considered and the significance of a higher value is explained. All of the exam-style questions have mark schemes embedded in the PowerPoint to allow students to continuously assess their progress and understanding.
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Module 4: Biodiversity, evolution and disease (OCR A-level Biology A)
The detailed content, exam-style questions, guided discussion points and quiz competitions that are found in each of the 16 paid lessons that are included in this bundle (as well as the 5 free lessons which are named at the bottom) cover the following specification points in module 4 of the OCR A-level Biology A specification: Module 4.1.1 * The different types of pathogen that can cause communicable diseases in plants and animals * The means of transmission of animal and plant communicable pathogens * The primary non-specific defences against pathogens in animals * The structure and mode of action of phagocytes * The structure, different roles and modes of action of B and T lymphocytes in the specific immune response * The primary and secondary immune responses * The structure and general functions of antibodies * An outline of the action of opsonins, agglutinins and anti-toxins * The differences between active and passive immunity, and between natural and artificial immunity * Autoimmune diseases * The principles of vaccination Module 4.2.1 * How biodiversity can be considered at different levels * The random and non-random sampling strategies that are carried out to measure the biodiversity of a habitat * How to measure species richness and species evenness * The use and interpretation of Simpson's Index of Diversity * How genetic biodiversity may be assessed * The ecological, economic and aesthetic reasons for maintaining biodiversity * In situ and ex situ methods of maintaining biodiversity * International and local conservation agreements made to protect species and habitats 4.2.2 * The biological classification of species * The binomial system of naming species and the advantage of such a system * The features used to classify organisms into the five kingdoms * The evidence that has led to new classification systems * The different types of variation * Using the standard deviation to measure the spread of a set of data * Using the Student's t-test to compare means of data values of two populations * Using the Spearman's rank correlation coefficient to consider the relationship of the data * The different types of adaptations to their environment * The mechanism by which natural selection can affect the characteristics of a population over time * How evolution in some species has an impact on human populations If you would like to get an idea of the quality of the lessons that are included in this bundle, then download the following five OCR A lessons which have been uploaded for free: Immunity & vaccinations Reasons for maintaining biodiversity Taxonomic hierarchy and the binomial naming system Adaptations and natural selection Transmission of animal and plant pathogens
£24.50
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Module 4.2.1: Biodiversity (OCR A-level Biology A)
The biodiversity topic may not be every students' favourite, but questions relating to this module 4 topic are very common in the OCR terminal exams, meaning it can be an area where a lot of marks are unfortunately lost. With this in mind, hours of research and planning has gone into each of the 6 lessons that are included in this bundle to ensure that the slides and accompanying worksheets contain interesting and relevant biological examples that will catch the attention of the students and ultimately increase the likelihood of the retention of the detailed A-level content. There are also regular understanding checks in the form of exam-style questions with accompanying mark schemes to allow the students to assess their progress. The following specification points in module 4.2.1 of the OCR A-level Biology A specification are covered in this bundle: * How biodiversity may be considered at different levels * Random sampling and non-random sampling (opportunistic, stratified, systematic) * How to measure species richness and species evenness * The use and interpretation of Simpson's Index of Diversity * How genetic biodiversity may be assessed, including calculations * The ecological, economic and aesthetic reasons for maintaining biodiversity * In situ and ex situ methods of maintaining biodiversity * International and local conservation agreements made to protects species and habitats The "reasons for maintaining biodiversity" lesson has been uploaded for free so if you download this, you will be able to recognise the quality of lesson that can be found in this bundle
£11.20
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