(fenÂ´-fenÂ´), n a combination of fenfluramine hydrochloride and phentermine hydrochloride, two stimulants, which promotes weight loss by reducing appetite. It is no longer available due to its damaging of the heart's valves.
A biologist is a scientist who studies living organisms. Biologists involved in basic research attempt to discover underlying mechanisms that govern how organisms function. Biologists involved in applied research attempt to develop or improve medical, industrial or agricultural processes. Some biologists work in management positions coordinating or supervising research.
A decomposer is an organism that breaks down waste and dead organisms into nutrients for the producers. These can be fungi, animals, bacteria, etc... An ecological niche is the role or function the organisms has in its ecosystem. For example, an owl's niche would be that of a hunter in his ecosystem. I hope this helps a bit.