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the fusion of two gametes.
double-membraned, pigmented, cytoplasmic organelles found in plant cells. The organelles have...
a pattern of abnormalities found in babies born to mothers who drank excessive amounts of...
outer body tissue layer that forms the epithelium and nervous tissue.
small, non-pigmented plastids that occur in roots and non-photosynthetic tissues of plants. They...
(also called a glacial age) a long period of low temperature on Earth, during which large sheets...