Can you just check if maybe these definitions are okay:
Homeostasis - the maintenance of a relatively stable internal environment within narrow ranges despite fluctuating conditions in external environment of an organism.
Negative Feedback Mechanism refers to the homeostatic process by which living organisms are able to detect changes in internal environment, and counterract these changes in the opposite direction to restore conditions to initial narrow range of tolerance.
Pheromones are chemical signalling molecules released into the external environment of organisms, usually by insects, that can affect the behaviour of another member of the same species. Pheromones are usually released by female organisms, and can be used to attract males for mating, food locations, alarm for predators, or for establishing territories.
ON Uni Bio, what is it that you have to do.? Are there assessments, exam/s, etc??