Struggling with your prescribed literature?
Our Literature Study Guides provide insights and analysis of themes and characters and includes guidelines for writing your exam.
a level an organism occupies in the food chain.
produced, growing, living, or occurring naturally in a particular region or environment.
(also called selectively permeable membrane) a membrane which allows some substances to cross it...
the domain that contains prokaryotic micro-organisms. Some live in extreme environments, such as...
a strong ring of smooth muscle at the end of the pyloric canal which lets food pass from the...
external opening of the rectum (part of the mammalian digestive tract) through which faeces are...