Skip to main content
Geosciences LibreTexts

8: Evolution Part I - The Theory

  • Page ID
    22420
  • \( \newcommand{\vecs}[1]{\overset { \scriptstyle \rightharpoonup} {\mathbf{#1}} } \) \( \newcommand{\vecd}[1]{\overset{-\!-\!\rightharpoonup}{\vphantom{a}\smash {#1}}} \)\(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\) \(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\)\(\newcommand{\AA}{\unicode[.8,0]{x212B}}\)


    Homology in fish and tetrapod limbs
    Figure \(\PageIndex{1}\): Comparison between the fins of lobe-finned fishes (Sarcopterygii) and legs of early tetrapods. 1. Tiktaalik. 2. Panderichthys. 3. Eusthenopteron. 4. Acanthostega.
    5. Ichthyostega (hindleg). (Public domain image.)
    Key Concepts

    At the end of this chapter, students should be able to:

    • Define biological evolution.
    • Distinguish between macro and microevolution.
    • Distinguish between different patterns that occur in nature as a result of evolutionary processes.
    • Describe how life is organized using systematics.
    • Identify some of the key ideas and players in the history of Evolutionary Theory.
    • Identify the key paradigms in the development of Evolutionary Theory.
    • Identify the ways that genes are passed on through various forms of inheritance to the next generation.


    This page titled 8: Evolution Part I - The Theory is shared under a CC BY-NC 4.0 license and was authored, remixed, and/or curated by Callan Bentley, Karen Layou, Russ Kohrs, Shelley Jaye, Matt Affolter, and Brian Ricketts (VIVA, the Virginia Library Consortium) via source content that was edited to the style and standards of the LibreTexts platform; a detailed edit history is available upon request.