Frog metamorphosis
A juvenile frog metamorphoses into a frog. Here, the frog has started to develop limbs, but its tadpole tail is still evident.
Source
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"OpenStax College, Amphibians. October 17, 2013."
http://cnx.org/content/m44688/latest/Figure_29_03_04.jpg
OpenStax CNX
CC BY 3.0.
