DR KEITH WHEELER / SCIENCE PHOTO LIBRARY DR KEITH WHEELER / SCIENCE PHOTO LIBRARY
Female pine cone seed. Light micrograph of a section through a seed from a female pine (Pinus sp.) cone, showing the mature embryo and endosperm. The seed consists of the integument - central embryo with several cotyledons - a plumule (top), hypocotyl (middle) and a radical (bottom). Magnification: x5 when printed 10 centimetres wide.
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