الفهرس 
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Abstract
For a long time; the morphological and anatomical features were
considered to be the most basic features for the classification of algae in
general. As a result, many problems appeared, as for example, the problem of polymorphism for the same algal species under different ecological factors. This, and many others, forced the taxonomists to search for others evidences to
classify algae. The biochemical features, beside the morphological and
anatomical features, were then proposed to be effective tools, that can be used
for drowing a more stable and reasonable classification system.