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found in the cell wall of xylem cells where the secondary cell wall is absent but the primary cell wall is present. They allow lateral movement of water within the plant.
organelles that only occur in the green parts of plants. They contain the green pigment...
a form of asexual reproduction. It is an unequal cell division, in which a small cell forms...
any disease that is caused by a virus or a bacterium or any other micro-organism.
cellular respiration that takes place in the presence of free oxygen.