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an almost self-contained ecological unit.
the forming new plants asexually (without the production of seeds or spores).
the process whereby certain substances are removed from a liquid and others retained, due to...
a collection of tissues joined in a structural unit to serve a common function.
allergic reaction to certain allergens such as pollen. It causes sneezing, a runny nose and...
a molecule that is converted to adenosine triphosphate (ATP) for energy storage.