Humans are terrestrial vertebrates with the ability to be successful in and alter various environments. Humans are a part of the tree of life; DNA studies reveal a single origin. Robert Martin cites the origin of suckling as an example of DNA origin confirmation.
Classification organizes biological information; experts traditionally use the Linnaean System. Modern anthropology and biology uses cladistics to understand evolutionary relationships and construct a phylogeny. Common ancestry and convergence are two kinds of similarity; hear examples.
Vertebrates appeared approximately 450 million years ago and evolved to live on land; Tiktaalik is the transitional fossil. Early reptiles divided into ancestors of present-day reptiles and birds, and ancestors of present-day mammals; Robert Martin identifies differences.
Mammals are a dominate terrestrial vertebrate group that evolved from synapsids at the beginning of the Mesozoic era; see a cast of an early mammal. During the Cenozoic era, modern groups of mammals appeared and adapted to various environments.
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This film discusses the place of humans within the world by examining basic vertebrate and mammalian evolutionary history. The program looks at the classification, construction, and interpretation of evolutionary relationships.
Length: 20 minutes
Copyright date: ©2012
Prices include public performance rights.
Not available to Home Video, Dealer and Publisher customers.
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