Chapter 25 Phylogenies

Chapter 25 Phylogenies - Chapter 25 Phylogenies 25.1...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 25 Phylogenies 25.1 Phylogenies - description of the evolutionary history or relationships among organisms - root - common ancestor of all organisms - group of species – taxon - taxon consisting of all evolutionary decedents of a common ancestor – clade - 2 closest relatives species – sister species Comparisons among species - try to ascertain when traits evolved - can be used to infer environmental information - homologous – a feature shared by 2 or more individuals - vertebra is a homolog of all vertebrates - derived trait- trait different from ancestral trait - derived traits among a group of organisms used as evidence for common ancestry –synapomorphies - vertical column is a synapomorphyy of all vertebrates - independently evolved traits subjected to similar selection may become superficially similar –convergent evolution - character reverting from a derived state, back to ancestral state – evolutionary reversal - traits similar other than inheritance- homoplasies
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern