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B
Exospore
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C
Hormogone
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D
Trichome
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Solution
The correct option is C Hormogone Cyanobacteria are blue-green algae which are capable of photosynthesis. They are able to fix atmospheric nitrogen. They reproduce asexually. The commonest mode of reproduction is fragmentation. The short pieces of filaments are called hormogones. These hormogones develop into new filamentous cynobacteria.