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Macro and micronucleus are the characteristic feature of
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- Paramecium and Vorticella
- Opelina and Nictothisus
- Hydra and Ballantidium
- Vorticella and Nictothirus
Correct Option: A
The macronucleus lacks nuclear membrane and is formed of trophochromatin. It regulates the metabolic activities of the body and it is also known as trophonucleus. The micronucleus has a definite nuclear membrane and controls the reproductive activities of Paramecium and Vorticella.