Excerpt from A Synopsis of the Animal Kingdom Together With a Laboratory Practicum of Invertebrate Zoölogy
Unicellular animal organisms. Reproduction by fission and gemmation, also by conjugation, which may simulate sex-differentiation. Colonial forms may show polymorphism (with division of labor) and thus serve as transition forms between protozoa and metazoa.
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Harris Hawthorne Wilder was an American zoologist and anatomist. He was professor of zoology at Smith College in Massachusetts, where for 36 years until his death. He was the first American to study dermatoglyphics, the study of skin ridges and fingerprints, and this along with his studies of facial reconstruction placed him among the pioneers of fingerprint analysis and forensic sciences.