History of botany scope of the subject as technology has opened up new techniques and areas of study. Modern molecular systematics, for example, entails the principles and techniques of taxonomy, molecular biology, computer science and more. Within botany there are a number of sub-disciplines that focus on particular plant groups, each with their own range of related studies (anatomy, morphology etc.). Included here are: phycology (algae), pteridology (ferns), bryology (mosses and liverworts) and palaeobotany (fossil plants) and their histories are treated elsewhere (see side bar). To this list can be added mycology, the study of fungi, which were once treated as plants, but
Biology of trust that allow OT, AVP, and DA to exert their effects in high and low level processes in the brain that provide a foundation for social trust. In studies with human subjects who experienced social isolation, there was an increase in activity in the hypothalamic-pituitary-adrenal (HPA) axis-a neural network involved in the release of cortisol, a stress-response hormone. This same research showed a deactivation in brain regions associated with OT and AVP. Biology of trust The biology of trust is the study of physiological mechanisms involved in mediating trust in social attachments. It has been studied in terms of genetics, endocrinology