TAILIEUCHUNG - Lecture Science 1 - Associate Degree in Education: Lecture 9 - Dr. Arshad Bashir

Lecture 9 - Biodiversity, natural selection and adaptation. In this week, students learn that adaptive characteristics of a species affect its chance for survival or possible extinction. As they explore adaptation, they draw on their experience to provide examples of: Biological adaptations that enhance survival and reproductive success in a particular environment; adaptations, such as changes in structures behaviors; physiology. | Lecture # 9 SCIENCE 1 ASSOCIATE DEGREE IN EDUCATION BIODIVERSITY, NATURAL SELECTION AND ADAPTATION DIVERSITY In this week, Students learn that adaptive characteristics of a species affect its chance for survival or possible extinction. As they explore adaptation, they draw on their experience to provide examples of: Biological adaptations that enhance survival and reproductive success in a particular environment Adaptations, such as changes in structures behaviors Physiology Natural Selection Student may have some difficulty understanding natural selection. The reason is that natural selection requires the integration of two distinct processes in evolution: The random occurrence of new traits in a population The non-random effects of these new traits on survival Natural Selection continue . Student may view natural selection as a process that perfects organisms. However, it is actually the simple result of variation, differential reproduction, and heredity. Alternatively, they may misinterpret natural selection as a random process because the genetic variation that occurs in a population is the result of random mutation. Natural Selection continue . Be very clear when choosing your words. Continue to emphasize that selection acts on that variation in a non-random way: Genetic variants that aid survival and reproduction are more likely to become common than variants that don’t. Throughout this unit, keep an eye out for any indication that Student might be developing either of these two common misconceptions. SPECIES: DARWIN’S FINCHES Begin by asking Student where they think the biodiversity on Earth comes from Have them use the knowledge they learned in unit 2 about ecosystems, resources, and populations Also, ask them why some ecosystems have a large number of different species and others only have a few SPECIES: DARWIN’S FINCHES continue Have them use their records of what they discovered in their plot of land in unit 2 and use their catalogue of the .

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