The Death Of Bees Explained – Parasites, Poison and Humans
In 2015 the bees are still dying in masses. Which at first seems not very important until you realize that one third of all food humans consume would disappear with them. Millions could starve. The foes bees face are truly horrifying – some are a direct consequence of human greed. We need
From playlist Medicine & Biology
Professional antigen presenting cells (APC) and MHC II complexes | NCLEX-RN | Khan Academy
Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/science/biology/human-biology/immunology/v/professional-antigen-presenting-cells-apc-and-mhc-ii-complexes How professional antigen presenting cells present parts of eng
From playlist Human anatomy and physiology | Health & Medicine | Khan Academy