Synopsis
Spec references J247: B6.3l J250: B6.3i. Researchers study microbes in extreme environments, which increases their risk of exposure to pathogens. Previous illness has helped build their immunity. White blood cell goes to lymph node, which produces antibodies if the pathogen is recognised. Second part of clip shows research on natural killer cells (type of white blood cell) and how they fight off pathogens.
Sea turtle conservation | A Perfect Planet
Spec references J247: B6.1b, B6.1c J250: B6.1b, B6.1c. How increasing ocean temperatures affect currents, and therefore marine animals. Conservation of sea turtles example is used in this clip, including how changing sea temperatures affect their survival.
Importance of marine protected areas | A Perfect Planet
Spec references J247: B6.1b, B6.1c, B6.1d J250: B6.1b, B6.1c. How an increase of carbon dioxide and overfishing impacts the sea ecosystem. There has been the creation of marine protected areas, trying to prevent poaching. Sharks, whales and dolphins can also accidentally get killed, for example through commercial fishing.