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a microscope that uses light to produce images.
a complex organic substance needed by the body in small amounts for normal growth and...
(also called secondary thickening) growth due to new cells being formed by the secondary...
the acidic fluid secreted into the mammalian stomach which contains various digestive enzymes...
the inner body tissue layer that forms the gut and other internal organs.
double-membraned, pigmented, cytoplasmic organelles found in plant cells. The organelles have...