A biome is an area of the planet that can be classified according to the plants and animals that live in it. ... A biome is a specific geographic area notable for the species living there. A biome can be made up of many ecosystems. For example, an aquatic biome can contain ecosystems such as coral reefs and kelp forests.
Millions of patients donate tissue altruistically for research, but doctors and researchers can’t know at the outset whose donation, if any, will end up making money. That’s not to say that there aren’t times when compensation is appropriate.