Struggling with your prescribed literature?
Our Literature Study Guides provide insights and analysis of themes and characters and includes guidelines for writing your exam.
an informal term for any living species which appears to be the same as a species otherwise only known from fossils and which has no close living relatives. These species have all survived major extinction events. The coelacanth is an example of a living fossil.
the actions of the body's immune system that work to fight infections or disease.
biological, chemical, or physical agent that stimulates a characteristic function or causes a...
regions in particular geographical locations with similar climates and vegetation types.