Sea Urchin egg ten minutes after fertilization. After fertilization, a coating is produced which prevents entry by other sperm ,polyspermy,. SEM X600 at 4-x4-
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Sea Urchin egg ten minutes after fertilization. After fertilization, a coating is produced which prevents entry by other sperm ,polyspermy,. SEM X600 at 4-x4-

Filename: 533954.jpg
Photographer: David Phillips
Source: Visuals Unlimited, Inc.
Date: 2 Nov 2011
Location:
Credit: Dr. David Phillips/Visuals Unlimited, Inc.
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Model Release: No
Property Release: No
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