A Level Biology Revision "Evolution by Natural Selection"

????

In this video, we look at evolution by natural selection. First we explore the idea of selection pressures and the effect of these on organisms. We then look at the process of natural selection. Finally, we look at how natural selection has lead to the development of antibiotic-resistant bacteria and pesticide-resistant insects. Image credits: Polyphemus Moth https://commons.wikimedia.org/wiki/File:Antheraea_polyphemus_-_Polyphemus_Moth.jpg Ilona Loser, CC BY-SA 4.0 https://creativecommons.org/licenses/by-sa/4.0, via Wikimedia Commons Dolphin https://commons.wikimedia.org/wiki/File:Dolphind.jpg sheilapic76, CC BY 2.0 https://creativecommons.org/licenses/by/2.0, via Wikimedia Commons Marram Grass https://commons.wikimedia.org/wiki/File:Marram_Grass,_Goswick_Sand_Dunes_-_geograph.org.uk_-_2135294.jpg Marram Grass, Goswick Sand Dunes by�Mick Garratt, CC BY-SA 2.0 https://creativecommons.org/licenses/by-sa/2.0, via Wikimedia Commons Myoxocephalus scorpius PAQ https://commons.wikimedia.org/wiki/File:Myoxocephalus_scorpius_PAQ.jpg https://upload.wikimedia.org/wikipedia/commons/b/b8/Myoxocephalus_scorpius_PAQ.jpg Placental mole https://en.wikipedia.org/wiki/File:ScalopusAquaticus.jpg#file Kenneth Catania, CC BY-SA 3.0 https://creativecommons.org/licenses/by-sa/3.0, via Wikimedia Commons Moorland stream https://commons.wikimedia.org/wiki/File:Moorland_Stream_-_geograph.org.uk_-_2350455.jpg Moorland Stream by�Philip Platt, CC BY-SA 2.0 https://creativecommons.org/licenses/by-sa/2.0, via Wikimedia Commons Wolf https://commons.wikimedia.org/wiki/File:Front_view_of_a_resting_Canis_lupus_ssp.jpg Gary Kramer, Public domain, via Wikimedia Commons Rabbit with myxomatosis https://commons.wikimedia.org/wiki/File:Rabbit_with_Myxomatosis_1(RLH).jpghttps://commons.wikimedia.org/wiki/File:Rabbit_with_Myxomatosis_1(RLH).jpg Richard Harvey, CC BY 3.0 https://creativecommons.org/licenses/by/3.0, via Wikimedia Commons Snowy moor https://commons.wikimedia.org/wiki/File:A_snowy_Rannoch_Moor_-_geograph.org.uk_-_1638676.jpg Dave Fergusson�/�A snowy Rannoch Moor Desert https://commons.wikimedia.org/wiki/File:Desert_(9).jpg Mostafameraji, CC BY-SA 4.0 https://creativecommons.org/licenses/by-sa/4.0, via Wikimedia Commons Charles Darwin https://commons.wikimedia.org/wiki/File:Charles_Darwin_aged_51.jpg Messrs. Maull and Fox, Public domain, via Wikimedia Commons Snowshoe 1 https://commons.wikimedia.org/wiki/File:MK04608_Snowshoe_Hare_(Banff).jpg Martin Kraft, CC BY-SA 3.0 https://creativecommons.org/licenses/by-sa/3.0, via Wikimedia Commons Snowshoe 2 https://commons.wikimedia.org/wiki/File:Snowshoe_hare_(52924634241).jpg USFWS Midwest Region from Midwest Region, United States, Public domain, via Wikimedia Commons Snowshoe 3 https://commons.wikimedia.org/wiki/File:Lepus_americanus_5459.JPG Walter Siegmund, CC BY-SA 3.0 https://creativecommons.org/licenses/by-sa/3.0, via Wikimedia Commons Snowshoe 4 https://commons.wikimedia.org/wiki/File:Snowshoe_Hare_(Lepus_americanus)_-_Gros_Morne_National_Park,_Newfoundland_2019-08-20.jpg Ryan Hodnett, CC BY-SA 4.0 https://creativecommons.org/licenses/by-sa/4.0, via Wikimedia Commons Snowshoe 5 https://commons.wikimedia.org/wiki/File:A_snowshoe_hare_(b35f0212-39a8-4d9b-bb2f-0cbfbac39213).jpg English: Mary Lewandowski, Public domain, via Wikimedia Commons Snowshoe 6 https://commons.wikimedia.org/wiki/File:SNOWSHOE_HARE_(Lepus_americanus)_(8-20-13)_stunner_c_g,_n-w_conejos_co,_co_(3)_(9592430167).jpg ALAN SCHMIERER, CC0, via Wikimedia Commons Canada Lynx https://en.wikipedia.org/wiki/File:Canada_lynx_by_Michael_Zahra_(cropped).jpg Michael Zahra, CC BY-SA 3.0 https://creativecommons.org/licenses/by-sa/3.0, via Wikimedia Commons Bobcat https://commons.wikimedia.org/wiki/File:Bobcat_at_Columbus_Zoo_Boo.jpg Becker1999 (Paul and Cathy), CC BY 2.0 https://creativecommons.org/licenses/by/2.0, via Wikimedia Commons Marten https://commons.wikimedia.org/wiki/File:Newfoundland_Pine_Marten.jpg Bailey Parsons, CC BY-SA 3.0 https://creativecommons.org/licenses/by-sa/3.0, via Wikimedia Commons Colorado potato beetle https://en.wikipedia.org/wiki/File:Colorado_potato_beetle.jpg Scott Bauer USDA ARS Staph A https://commons.wikimedia.org/wiki/File:Staphylococcus_aureus_VISA_2.jpg Content Providers(s): CDC/ Matthew J. Arduino, DRPH Photo Credit: Janice Haney Carr, Public domain, via Wikimedia Commons