Apoptosis
The histological section of a foot of a 15-day-old mouse embryo, visualized using light microscopy, reveals areas of tissue between the toes which apoptosis will eliminate before the mouse reaches its full gestational age at 27 days.
Source
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"OpenStax College, Response to the Signal. October 16, 2013."
http://cnx.org/content/m44453/latest/Figure_09_03_02.jpg
OpenStax CNX
CC BY 3.0.
