Anabaena is a cyanobacteria which lack a true nucleus because of absence of nuclear membrane. Notes : Anabaena is a genus of filamentous cyanobacteria that exist as plankton. They are known for nitrogen-fixing abilities, and they form symbiotic relationships with certain plants, such as the mosquito fern.
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Which cell organelle is most abundant around food vacuole in Amoeba
In protozoa, the function of contractile vacuole is the removal of excretory substances, carbon dioxide etc. It is very essential to regulate water content i.e., osmoregulation.