True sexual reproduction is absent in........

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(D) Blue-green algae,also known as $Cyanobacteria$,are prokaryotic organisms. They do not possess a well-defined nucleus or membrane-bound organelles.

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Blue-green algae

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(D) Blue-green algae,also known as $Cyanobacteria$,are prokaryotic organisms. They do not possess a well-defined nucleus or membrane-bound organelles. In $Cyanobacteria$,true sexual reproduction involving meiosis and gamete fusion is absent. They reproduce primarily through asexual methods such as binary fission,fragmentation,or the formation of akinetes and heterocysts.

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