HERVE CONGE, ISM / SCIENCE PHOTO LIBRARY HERVE CONGE, ISM / SCIENCE PHOTO LIBRARY
Fish embryo development. Light micrograph of a section through a fish embryo during the early stages development. The cells here are known as blastomeres. Blastomeres are produced through cleavage, a type of cell division, of the ovum after fertilisation. Many blastomeres make up a hollow sphere of cells known as the blastula (seen here). The two cells at centre are daughter cells produced through mitotic cell division. Here, they are in the interphase stage between mitotic divisions. Magnification: x1670 when printed 10 centimetres wide.
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