1.

Macro and micronucleus are the characteristic feature ofA. Paramecium and VorticellaB. Opelina and NictotihirusC. Hydra and BallantidiumD. Vorticella and Nictothirus

Answer» Correct Answer - A
(a) Paramecium and Vorticella have dimorphic nuclei (heterokaryotic). Micronucleus that is inactive except during cell division and houses the master copy of the genome. Macronucleus controls daily synthetic activities or on going metabolic functions of the cell and asexual reproduction. Macronucleus contains multiple copies of DNA.


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