DR KEITH WHEELER / SCIENCE PHOTO LIBRARY DR KEITH WHEELER / SCIENCE PHOTO LIBRARY
Pondweed. Light micrograph of a section through a branch from Chara sp. freshwater algae, showing the sex organs. These consist of large female oogonia (oval), below which are the male antheridia (round, orange). Magnification: x32, when printed 0 centimetres wide.
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