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blastula |
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blastula [′blas·chə·lə] (embryology) A hollow sphere of cells characteristic of the early metazoan embryo. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| On day 0, fathead minnow embryos (n = 240) at blastula and morula developmental stages were gathered from mating tiles in the husbandry unit at Brixham Environmental Laboratory. In the fruit fly, the blastula is actually considered one large cell, even though it contains more than one nucleus. For biochemical analyses, we used the material from 22 ripe females at the following stages: unfertilized eggs; embryos at 2-4 blastomeres (2 hr postfertilization), 16 blastomeres (3 hr), early blastula 1 (4. |
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