A) These are all unicellular protists
B) They have flagella
C) They produce spores
D) These are all parasites
Correct Answer: D
Solution :
| [d] Trypanosoma Noctiluca Monocystis and Giardia are all unicellular protists. Trypanosoma gambiense is the single celled parasitic zoofiagellate causing trypanosomiasis or sleeping sickness. |
| Giardia of the 'Grand old man of the intestine' is a diplomonadid parasitic flagellate occurring in the intestine of man and other animals and causes giardiasis or diarrhoea (i.e. very loose and frequent stool containing large quantity of fat). |
| Noctiluca is a marine colourless dinoflagellate. It is a voracious predator and has a long motile tentacle near the base of which its single short flagellum emerges. |
| Monocystis is a microscopic unicellular endoparasitic protozoan found in the coelom and seminal vesicles of earthworm. As it is an endoparasite it does not possess any special structure for locomotion. |
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