Excerpt from Biology, an Introductory Study for Use in Colleges

Organisms. The Cell as the Unit of Organic Structure. Cell Structure. Cell Substance or Protoplasm. The Nucleus. The Centrosome. The Cell Wall. Cell Functions. History of the Cell Doctrine: 1. The Early Conception of the Cell (1839 2. Protoplasm and the Mechanical Theory (1861 3. The Nucleus and its Significance (1880 to the present). What is Meant by Protoplasm.

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