Lecture
This lecture starts by showing a film illustrating the role of neutrophils in the blood, capable of engulfing and digesting bacteria. It then delves into the concept of endosymbiosis, explaining how mitochondria and chloroplasts within cells are believed to have originated from ancient bacterial cells through a process of symbiosis. The lecture provides evidence supporting this theory, such as the presence of circular DNA and ribosomes in mitochondria, resembling bacterial characteristics. The instructor discusses the evolutionary advantage of endosymbiosis and how these organelles have become essential for cellular energy production. The lecture concludes by highlighting the importance of mitochondria in providing energy for various cellular functions.