A-Level Biology - Biodiversity: Species Diversity | Species Richness & Evenness (2026/27 exams)

⭐️ Check out our website https://www.cognito.org/ ⭐️ *** WHAT'S COVERED *** 1. What biodiversity is and how variation exists. * The distinction between interspecific and intraspecific variation. 2. Key definitions associated with biodiversity. * Explanations of species, ecosystem, community, habitat and niche. 3. The three main levels of biodiversity. * Ecosystem diversity, species diversity and genetic diversity. 4. The components of species diversity. * The difference between species richness and species evenness. *** EXAM BOARD SPECIFIC INFO *** AQA - Everything is relevant to your course! OCR - You don't need to know the difference between interspecific and intraspecific variation CIE - You don't need to know the difference between interspecific and intraspecific variation *** CHAPTERS *** 0:00 Introduction to biodiversity 0:40 Interspecific vs intraspecific variation 1:13 Definition of species 1:30 Definition of ecosystem 1:53 Definition of community 2:12 Definition of habitat 2:23 Definition of niche 2:58 The three levels of biodiversity 3:18 Ecosystem diversity 3:38 Species diversity 3:56 Genetic diversity 4:23 Species richness vs species evenness *** PLAYLISTS *** https://youtube.com/playlist?list=PLidqqIGKox7VzYfPIVt8T09xOLNcolCe4&si=8JmDajxjtba6rdc3 https://youtube.com/playlist?list=PLidqqIGKox7UZ3mWhbHv2aA_1vnbsfRPq&si=q3hEKdA4v7kbfwMe https://youtube.com/playlist?list=PLidqqIGKox7UTimdJ3eFcnt6xL9GUt2a6 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 #Alevel #Biology #study #revision #school #exam #AQA #OCR #Edexcel