The Protozoan Life Cycle is a scientific book written by Gary Nathan Calkins and first published in 1906. The book is a comprehensive study of the life cycle of protozoa, which are single-celled organisms that are found in a variety of environments. Calkins provides an in-depth examination of the different stages of the protozoan life cycle, including the processes of asexual and sexual reproduction, as well as the various forms of protozoan motility...