• Entry
  • Reader's guide
  • Entries A-Z
  • Subject index

Researchers in biology have often directed their efforts toward elucidating the origins of major phyla or classification groups. While we have paid the most attention to the larger questions of transitions between classes, we are also considerably interested in the origins ...

    • Loading...
    locked icon

    Sign in to access this content

    Get a 30 day FREE TRIAL

    • Watch videos from a variety of sources bringing classroom topics to life
    • Read modern, diverse business cases
    • Explore hundreds of books and reference titles