Struggling with your prescribed literature?
Our Literature Study Guides provide insights and analysis of themes and characters and includes guidelines for writing your exam.
process whereby excess amino acids are broken down in the liver to form urea.
muscles that work in pairs and are responsible for causing movement in opposite directions in...
a foreign substance, usually a protein, that stimulates the production of one or more antibodies...
a black substance that coats the lungs of a smoker, causing cancer of the respiratory tract.
meristem that produces a layer of bark on the outer surface of a plant.
a connected network of vessels and glands, which carry lymph throughout the body.