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Questions tagged [protozoa]

Protozoa are a diverse group of unicellular eukaryotic organisms

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Why is “VOLVOX” not considered to be in PROTOZA?

Volovox is an Algae, but it moves with the help of Flagella. Protozoa has members that move by Flagella. Why is Volovox taxonomically in the Algae instead of Protozoa?
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Is there a limit on how big a free living unicellular mono-nuclear organism can be?

When I looked for the largest protozoan I've found the name Syringammina fragilissima. According to wikipedia " .. Syringammina fragilissima, is among the largest known coenocytes, reaching up to 20 ...
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First infection of malaria

As I know Plasmodium falciperum survive in either a host animal, human or mosquitoes. But how does malaria come to infect either of them initially? I am interested in knowing evolution of malaria. ...
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Why is contractile vacuole absent in parasitic protozoans but present in free living protozoans?

I know that contractile vacuole helps in osmoregulation of protozoans and some nitrogenous wastes are also excreted through it. Since contractile vacuole plays an important role in protozoans, why is ...
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Could we tell that cancerous cells behave that way because-of their genetic machinery is work in a “primitive” way like Amoeba?

Amoeba sp. is unicellular, so can't form a tissue. It need not go through any apoptosis. It just continuously get doubled. Could we compare them with cancer-cells? or in-reverse, could we tell ...