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double-membraned, pigmented, cytoplasmic organelles found in plant cells. The organelles have various physiological functions, such as the synthesis and storage of various substances.
those species that are found only in a particular area or region and nowhere else on Earth.
a sticky film that forms on the enamel of teeth. It is made up of small food particles, saliva...
a molecule that is converted to adenosine triphosphate (ATP) for energy storage.
outgrowths of neurons (nerve cells) that transmit nerve impulses towards the cell body.
the right and left halves of bilaterally symmetrical organisms are mirror images of each other...