Question

Conjugation in ciliate Protozoa is essential for
A) Gemmation
B) Regeneration of lost body parts
C) Permanent pairing of two individuals
D) Nuclear reorganisation

Answer 1

Hint:Conjugation is a sexual mode of reproduction found in primitive or lower class of organisms where there is nuclear exchange between two organisms of same species by the formation of sex pilli. Formation of sex pilli is the formation of bridge of cytoplasm between two compatible strains of protozoans.

Complete answer:
Gemmation is the process of formation of small buds from an individual which later develops into new organisms which can finally detach and develop into new individual as of their parent, it is a type of asexual mode of reproduction, this has nothing to do with conjugation. Conjugation does not involve in the regeneration process of an organism, regeneration is another mode of actual type of reproduction where an organism develop only lost body parts but in some organisms thus is one particular mode of asexual reproduction, where an organism is cut into two haves and each haves develops into new individual.

Conjugation is a temporary union is organisms through a bridge called sex pillus, it is not a permanent union of organisms, there is nuclear organisation seen in organisms carrying out conjugation.

Hence the correct answer is Option D.

Note:Conjugation occurs in steps in some of the protozoan between two compatible strains, where the micro nuclei undergo meiosis halting in four micro nuclei pet cell among which one Survive and rest degenerate and the one undergoes mitosis, the cells exchange micro nucleus through conjugation and then separate and each cells undergo series of changes and results in daughter cells through asexual mode of reproduction.