Struggling with your prescribed literature?
Our Literature Study Guides provide insights and analysis of themes and characters and includes guidelines for writing your exam.
acid formed when carbon dioxide dissolves in water.
(also called an extinction event) the sudden dying out of large number of species over a short...
the widespread and rapid extinction of species in the present age due to negative human impact...
strengthened, elongated xylem cells that conduct water.
in plants: the first plant to become established in an area.in plants: the first plant to become...
the spontaneous movement of molecules, atoms or ions, from an area of higher concentration to an...