The Whole of OCR-A A-Level Biology | Module 4: Biodiversity, evolution and disease | Revision

I want to help you achieve the grades you (and I) know you are capable of; these grades are the stepping stone to your future. Even if you don't want to study science or maths further, the grades you get now will open doors in the future. Tutoring - We can match you with an experienced tutor to help increase your confidence and fill in any gaps in your knowledge https://www.primrosekitten.com/pages/... 2025 predicted Exam Papers for GCSE and A-Level Biology, Chemistry, Physics, and Maths Revision Essential! https://www.primrosekitten.com/collec... FREE Revision Guides when you sign up for the mailing list plus discount codes and updates https://primrose-kitten.beehiiv.com/ 2025 predicted Exam Paper Walkthroughs Playlist    • Predicted Exam Paper Walkthroughs | 2025 E...   These are full walkthroughs of all the predicted papers that have been written for 2023 -full papers -what is the question REALLY asking -hints and tips from examiners -the background behind the question -how to structure your answer to get the most marks -what the mark schemes really mean 00:00:00 Start 00:00:30 Pathogens 00:02:54 defences against pathogens 00:06:45 Antigens 00:08:07 Phagocytosis 00:09:10 T lymphocytes 00:10:27 B lymphocytes 00:11:47 Antibodies 00:14:51 Vaccines and immunity 00:18:07 Autoimmune diseases 00:18:52 Possible sources of medicines 00:20:17 Antibiotic resistance 00:22:24 Ecosystems, populations and communities 00:24:05 Species diversity 00:25:12 Investigating biodiversity 00:33:30 Factors affecting biodiversity 00:38:41 Reasons for maintaining biodiversity 00:41:59 Types of conservation 00:48:04 Classification and taxonomy 00:52:17 Species 00:52:44 Features used in classification 00:57:07 Intraspecific and interspecific variation. 00:59:13 Evidence for natural selection 01:02:22 Mean, standard deviation and stats tests 01:06:51 Natural selection A* Exam Question Walkthroughs for A-Level    • A* Exam Question Walkthroughs for A-Level   A-Level Maths Courses, FREE revision guide and workbooks https://www.primrosekitten.com/pages/... A-Level Psychology Courses, FREE revision guide and workbooks https://www.primrosekitten.com/pages/... A-Level Biology Courses, FREE revision guide and workbooks https://www.primrosekitten.com/collec... A-Level Chemistry Courses, FREE revision guide and workbookshttps://www.primrosekitten.com/collec... A-Level Maths Playlist    • A-Level Maths | Revision Playlist   A-Level Biology playlists AQA    • AQA A-Level Biology | Ultimate Revision Pl...   Edexcel    • Edexcel A-Level Biology | Revision Playlist   OCR A    • Playlist   OCR B    • OCR B A-Level Biology | Revision Playlist   WJEC    • WJEC A-Level Biology | Revision Playlist   Edquas    • Playlist   A-Level Chemistry playlists AQA    • AQA A-Level Chemistry | Revision Playlist   Edexcel    • Edexcel A-Level Chemistry | Revision Playlist   OCR A    • OCR A A-Level Chemistry | Revision Playlist   OCR B    • OCR B A-Level Chemistry | Revision Playlist   WJEC    • WJEC A-Level Chemistry | Revision Playlist   Disclaimer; You should not carry out any of these practical’s without carrying out a full risk assessment of your own first. I am human, and I make mistakes, please point out any that you find and there is no need to follow that with a load of abuse. Image made with https://chemix.org/ PhET Interactive Simulations University of Colorado Boulder https://phet.colorado.edu Music; Something Elated by Broke For Free. From the Free Music Archive, CC BY Images from; Classroom Core (TpT), Hidesy Clipart (TpT), The Cher Room (TpT), The Triple Point (TpT), Ninja Woman (TpT), The Painted Crew (TpT) Teacher's Clipart (TpT) Shutterstock