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Biological Classification — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYBiological Classification3 Marks
Question
Mention the distinctive characters of cyanobacteria.
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Answer

Cyanobacteria:
  • They are unicellular, colonial or form trichomes.
  • The colonies are surrounded by a gelationous sheath.
  • They have chlorophylla, similar to green plants.
  • They are photosynthetic autotrophs.
  • They have a pigment, c-phycocyanin, that gives them the characteristic blue-green colour.
  • Some of them can fix atmospheric nitrogen in the specialised cells, called heterocysts.
  • They show vegetative reproduction by fragmentation or cell division.
  • No sexual reproduction has been reported. as genetic material.

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