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.
Ellisâs theory is designed to help people rationalise or make unproblematic clientâs cognitive patterns by placing irrational thoughts or problematic thoughts at the centre of clientâs emotional-behavioural problems designed to help clients accept the uncertainty of their future.llis concluded that many philosophers shared the view that events do not disturb people but their view of these events do. From this philosophical logic, Ellis decided to use this as the basis of his own approach, which became known as Relative Emotional Behavioural Therapy (REBT).