The endosymbiosis theory explains the origins of organelles such as mitochondria and chloroplasts in eukaryotic cells. The theory proposes that chloroplasts and mitochondria evolved from certain types of bacteria that eukaryotic cells engulfed through endophagocytosis.any instances of endosymbiosis are obligate; that is, either the endosymbiont or the host cannot survive without the other, such as the gutless marine worms of the genus Riftia, which get nutrition from their endosymbiotic bacteria.
Rational Emotive & Cognitive-Behavior Therapy. REBT is the pioneering form of cognitive behavior therapy developed by Dr. Albert Ellis in 1955. REBT is an action-oriented approach to managing cognitive, emotional, and behavioral disturbances.According to REBT, it is largely our thinking about events that leads to emotional and behavioral upset.EBT is an action-oriented approach to managing cognitive, emotional, and behavioral disturbances. According to REBT, it is largely our thinking about events that leads to emotional and behavioral upset.
Crowd psychology. Crowd psychology, also known as mob psychology, is a branch of social psychology. Social psychologists have developed several theories for explaining the ways in which the psychology of a crowd differs from and interacts with that of the individuals within it. Major theorists in crowd psychology include Gustave Le Bon, Gabriel Tarde, Sigmund Freud, and Steve Reicher. This field relates to the behaviors and thought processes of both the individual crowd members and the crowd as an entity. Crowd b