IGCSE Biology 4th edition

Biology books by
D G Mackean



Amphibia. Changes in egg after fertilization

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Amphibia. Changes in egg after fertilization
Changes after fertilization: a) Single cell. b) Nucleus divides. c) Cytoplasm divides - two cell stage. d) Four cell stage. e) Eight cells. f) Thirty-two plus cells. Many cells.

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