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Amphibian Evolution and Ecology

Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.
  • Video
    Transitional Fossil: Fish to Amphibians

    Transitional Fossil: Fish to Amphibians

    by Charles Yu //at grade

    Just one fossil in a long line of evidence showing how fish evolved into primitive amphibians some 370 million years ago. This excerpt is from the "Shape of Life" series.

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