What is common about Trypanosoma, Noctiluca, Monocystis and Giardia?

They produce spores.

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These are all parasites.

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These are all unicellular protists.

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They have flagella.

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Solution

The correct option is D These are all unicellular protists.
Noctiluca is a free-living non-parasitic marine-dwelling species of dinoflagellate. Trypanosoma is a genus of kinetoplastids, a monophyletic group of unicellular parasitic flagellate protozoa. Monocystis is spore forming protozoa in the class Sporozoa. They are parasitic to earthworms. Giardia is a genus of anaerobic flagellated protozoan parasites of the phylum Sarcomastigophora that colonise and reproduce in the small intestines of several vertebrates, causing giardiasis.
So, answer is- 'These are all unicellular protists'.

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Question 7
A feature of reproduction that is common to Amoeba, Spirogyra and Yeast is that

(a) they reproduce asexually
(b) they are all unicellular
(c) they reproduce only sexually
(d) they are all multicellular

Q. They are saprophytic fungus-like protists. Under suitable conditions, they form multinuclear cytoplasmic aggregate called plasmodia. Their spores possess true walls. Identify the organism.

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