Question

When a student adds a few drops of diluted picric acid to a paramecium slide, he observes that the paramecium releases some transparent spine-like projections to protect its body from the acid. What is the significance of these projections?
The projections are trichocysts, released for the self-defense of the paramecium.
The projections are pseudopodia, released for the locomotion of the paramecium.
The projections are cilia, released for the locomotion of the paramecium.

Answer 1

The projections are trichocysts, released for the self-defense of the paramecium.