Sometimes it is easier to visualize a complicated process by comparing it to something more familiar. In echinoderm blastulas, the process of gastrulation would be most similar to ...

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    inflating a balloon.
    drilling a hole in a golf ball.
    cracking an egg.
    pushing your finger into an inflated balloon.
asked May 19, 2013 in Biology by anonymous
    

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pushing your finger into an inflated balloon.
answered May 20, 2013 by Bioshare ~Top Expert~ (34,070 points)

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