Elements of biology, with special Elements of biology, with special reference to their rôle in the lives of animals elementsofbiolog00buch Year: 1933 CONTRACTILE VACUOLE NUCLEUS FIG. 28. SARCODINA-AMOEBA EYE SPOT COLOR PLASriD NUCLEUS CILIA CONTRACTILE VACUOLE UICRONUCLEUS i UACRONUCLEUS CONTRACTILE VACUOLE

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