Section I. Physiological Aspects of Silicon. - 2. Silicon in the Cellular Metabolism of Diatoms. - 3. Germanium-Silicon Interactions in Biological Systems. - 4. Silicon in Bone Formation. - Section II. Siliceous Structures: Distribution Deposition Ultrastructure Morphogenesis. - Algal Groups. - 5. Morphology and Phyletic Relationships of the Silicified Algae and the Archetypal DiatomMonophyly or Polyphyly. - 6. The Siliceous Components of the Diatom Cell Wall and Their Morphological Variation. - 7. Cell Wall Formation in Diatoms: Morphogenesis and Biochemistry. - 8. Ultrastructure and Deposition of Silica in the Chrysophyceae. - Protozoa. - 9. Distribution and Forms of Siliceous Structures Among Protozoa. - 10. Ultrastructure and Deposition of Silica in Rhizopod Amebae. - 11. Ultrastructure and Deposition of Silica in Loricate Choanoflagellates. - 12. Evolution and Diversity of Form in Radiolaria. - 13. Radiolarian Fine Structure and Silica Deposition. - Higher Plants. - 14. Ultrastructure of Silica Deposits in Higher Plants. - 15. Silica in Shoots of Higher Plants. - Sponges. - 16. Form and Distribution of Silica in Sponges. - 17. Ultrastructure and Deposition of Silica in Sponges. - 18. Effects of Germanium on Silica Deposition in Sponges. Language: English