In museum study, paramecium shows a large macronucleus for daily functions and a small micronucleus involved in reproduction. The specimen or feature is best linked with:

Ciliates commonly possess nuclear dimorphism: a macronucleus controlling metabolic activities and a micronucleus involved in genetic exchange and reproduction. This feature is important in Paramecium. This MCQ belongs to the Ciliates topic in Animal Diversity-I and is written to test concept understanding rather than memorized wording.