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a graphical representation of the evolutionary relationship between taxonomic groups based on certain characteristics.
fats that are solid at room temperature and are found in animals. They are thought to be linked...
the process in which micro-organisms, such as yeast, convert sugars into alcohol under anaerobic...
(also called a glacial age) a long period of low temperature on Earth, during which large sheets...
long threads of genetic material (DNA and histone) found in the nucleus of a non-dividing cell...