GCSE Biology (9-1) - GCSE Biology - Competition & Interdependence (2026/27 exams)

⭐️ Check out our website https://www.cognito.org/ ⭐️ *** WHAT'S COVERED *** 1. Ecology and Relationships * Relationships between organisms (same species, different species, predators, prey) * Relationships between organisms and their environment (oxygen, carbon dioxide, soil) 2. Ecosystem Interdependence * How changes in one part of an ecosystem (e.g., population size) affect other parts 3. Key Ecological Terms Explained * Habitat * Population * Community * Biotic Factors * Abiotic Factors * Ecosystem 4. Competition for Resources * Why organisms compete (limited resources) * Resources competed for by animals (space, food, water, mates) * Resources competed for by plants (light, space, water, mineral ions) * Competition between different species and within the same species 5. Interdependence Illustrated * Using food webs to show feeding relationships * How changes in one population (e.g., field mice) can impact multiple other populations in the food web *** CHAPTERS *** 0:00 Ecology 0:42 Interdependence 1:05 Habitat, Population, Community 1:52 Biotic and Abiotic Factors 2:16 Ecosystem Definition 2:50 Competition 3:30 Types of Competition: Between and Within Species 3:49 Interdependence: Food Webs and Feeding Relationships *** PLAYLISTS *** https://youtube.com/playlist?list=PLidqqIGKox7XPh1QacLRiKto_UlnRIEVh&si=orIUwL3o2jOoiYjT https://youtube.com/playlist?list=PLidqqIGKox7X5UFT-expKIuR-i-BN3Q1g&si=DcihOwUkd9oWbbdp https://youtube.com/playlist?list=PLidqqIGKox7WeOKVGHxcd69kKqtwrKl8W&si=Y8MsO-FK948jnxpS https://youtube.com/playlist?list=PLidqqIGKox7UVC-8WC9djoeBzwxPeXph7&si=-7i5Iq7yOeJrhtu6 https://youtube.com/playlist?list=PLidqqIGKox7VKJD2WxRhoKaI6JGLVean8&si=NH_Q1ujhVgACM2FU #GCSE #Biology #study #revision #school #exam #AQA #OCR #Edexcel #IGCSE