Answer:
The correct answer is given below:
Step-by-step explanation:
Caenorhabditis elegans is a round worm. It is a microscopic organism that lives in the soil. It is regarded as a model organisms because its organ systems such as nervous, muscular and reproductive are similar as in higher animals such as mice and humans. 131 cells formed in the developing embryo die by the process of apoptosis. It is a programmed cell death. The cell death is not random; but which cells will die and at what stage is completely programed.