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vascular tissue that conducts food substances from the leaves to other parts of the plant. The cells are living with perforated end plates.
fats that are solid at room temperature and are found in animals. They are thought to be linked...
the excessive growth of alga and hydrophytes in response to the addition of artificial or...
two bean-shaped guard cells surrounding a pore in the epidermis of a leaf that allow gases to...
unicellular organisms that do not have a proper nucleus or membrane bound organelles.
an atmospheric gas made of three oxygen molecules bonded together (O3).