. The origin and evolution of life, on the theory of action, reaction and interaction of energy. lasm (gray) axd Chromatin (black) of Amoeba, A Typical Protozoan. A group of six specimens of Amceha Umax magnified 1000 diameters; /> = protoplasm;(7;;-. = chromatin substance of nucleus; d = vacuoles. I and 5. Two amoebse with the chromatin nucleus {chr.) in the resting stage. 2. An amoeba with the chromatin nucleus dividing into two chromatin nuclei. 3. A parent amceha with chromatin nuclei completely separated. 4. Protoplasm and chromatin nuclei separated to form two young amoebae. After a p
. The origin and evolution of life, on the theory of action, reaction and interaction of energy. lasm (gray) axd Chromatin (black) of Amoeba, A Typical Protozoan. A group of six specimens of Amceha Umax magnified 1000 diameters; /> = protoplasm;(7;;-. = chromatin substance of nucleus; d = vacuoles. I and 5. Two amoebse with the chromatin nucleus {chr.) in the resting stage. 2. An amoeba with the chromatin nucleus dividing into two chromatin nuclei. 3. A parent amceha with chromatin nuclei completely separated. 4. Protoplasm and chromatin nuclei separated to form two young amoebae. After a photograph by Gary N. Calkins. tion of protoplasmic structure in the cellular tissues (histology).Since 1880 it has taken a new direction in investigating thechemical and Junctional separation of the chromatin. As proto-plasm is now known to be the expression, so chromatin is nowknown to be the seat of heredity which Nageli (1884) was thefirst to discuss as having a physicochemical basis; the ^idio-plasm postulated in his theory being realized in the actual 94 THE ORIGIN AND EVOLUTION OF LIFE.
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