19
votes
Accepted
Can anyone ID this microorganism?
Appears to be a ciliate protist called Vorticella.
Image source: Wikimedia (Author: Frank fox, 2010)
Vorticella always stood out to me because of their long, narrow stalk they use for anchoring with ...
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1
vote
Accepted
Why is contractile vacuole absent in parasitic protozoans but present in free living protozoans?
No, you are wrong. Parasitic protozoans too have contractile vacuole, for example trypanosoma.
Also Wikipedia says:
Not all species that possess a contractile vacuole are freshwater organisms; some ...
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