NEET BIOLOGY

Detailed explanation-1: -The organism cannot survive without the macronucleus; it cannot reproduce without the micronucleus. The macronucleus is the centre of all metabolic activities of the organism. The micronucleus is a storage site for the germline genetic material of the organism.

Detailed explanation-2: -Three nuclei disintegrate and the remaining one divides mitotically and the nucleus swaps into both of the cells. Then two haploid nuclei fuse in each cell and form a new diploid micronucleus. Hence, the micronucleus controls reproduction in Paramecium.

Detailed explanation-3: -A paramecium cell consists of two nuclei – micronucleus (small) and macronucleus (large). The smaller nucleus is responsible for reproduction; in other words, it serves as the signaling organelle for asexual reproduction in paramecium.

Detailed explanation-4: -Ciliates contain two types of nuclei: a micronucleus and a macronucleus. The micronucleus serves as the germ line nucleus but does not express its genes. The macronucleus provides the nuclear RNA for vegetative growth.

Detailed explanation-5: -The macronuclei control metabolic and developmental functions; the micronuclei are necessary for reproduction.