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A blastula is A. a digestive organ. B. the innermost germ layer. C. a layer of embryological tissue. D. a hollow ball of cells in an embryo.
Weegy: C. a layer of embryological tissue. (More)
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Updated 7/6/2015 2:59:37 AM
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A blastula is a hollow ball of cells in an embryo.
Added 7/6/2015 2:59:36 AM
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Confirmed by jeifunk [7/6/2015 3:19:32 AM]
Gametes are formed by A. parthenogenesis. B. mitosis. C. fertilization. D. meiosis.
Weegy: C. fertilization (More)
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Updated 7/11/2012 4:34:13 PM
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Gametes are formed by meiosis.
Added 7/11/2012 4:34:13 PM
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The mammals whose offspring are little more than embryos are A. monotremes. B. marsupials. C. placentals. D. amphibians.
Weegy: The mammals whose offspring are little more than embryos are: B. marsupials. (More)
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Updated 1/25/2014 11:08:35 AM
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All animals eat to obtain A. oxygen. B. ammonia. C. carbon dioxide. D. nutrients.
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Updated 3/2/2016 2:21:54 PM
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All animals eat to obtain nutrients.
Added 3/2/2016 2:21:54 PM
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Confirmed by yumdrea [3/2/2016 7:49:50 PM]
A blastula is
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Updated 9/1/2015 12:05:54 AM
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The blastula is an early phase of embryonic development that occurs when the fertilized egg has divided multiple times, but before its cells have become differentiated.

Added 9/1/2015 12:05:54 AM
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