The life cycle of Paramecium involves which processes? A) binary and multiple fission B) conjugation and asexual reproduction C) conjugation and sexual reproduction D) sexual and asexual reproduction

What this question is testing

You need to recall the two main ways Paramecium continues its life cycle: one for making more individuals quickly, and one for mixing genetic material.

Asexual part of the life cycle

Paramecium reproduces asexually by binary fission, where one cell divides into two identical daughter cells.

Sexual process in Paramecium

Paramecium also undergoes conjugation, where two cells temporarily join and exchange micronuclear material. This increases genetic variation.

Choosing the best option

• B is correct because it matches the real pair: conjugation (sexual process) plus asexual reproduction (binary fission).
• A is wrong because Paramecium is known mainly for binary fission; “multiple fission” is not the standard life-cycle description for Paramecium.
• C is misleading because conjugation is the sexual process itself, and it does not directly produce more individuals.
• D is too vague and less accurate than B, since the sexual process in Paramecium is specifically conjugation.