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Figure 4–2. Thread-like structures of blue-green algae: 1 — most simple structure of the fibre with diffusion growth in Oscillatoria; 2 — fibre with differentiated basis in Endonema; 3 — upper part of a fibre in Rivularia, extended like a hair; 4 — intercalated growth in Gloeotrichia; 5 — apical growth at the ends of branches in Scytonoma; 6 — basal growth in Fischirella; 7 — complex branchy fibrious structure in Fischirella (From Life of Plants, vol. 3, 1977).
Sea fungi of Porifera (or Spongia) type also are a community of cells
organized in a different way. They are peculiar multicellular organisms.
Because of their appearance and structure, for a long time taxonomists
have been hesitated where is to assign them — to the plants or to the
animals. After intensive research, now they are considered to be the most