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Where cells, tissues, and organs become specialized for a particular function |
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The development of the animal's shape, or body form, and organization |
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The production of gametes |
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The union of male and female gametes |
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Cleavage and blastulation |
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The production of a multicellular blastula |
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The formation of three primary germ layers: ectoderm, mesoderm, and endoderm |
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The development of organs from the three primary germ layers |
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Composed of protein and fat, to be utilized by the early embryo |
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The mitotic cell divisions of cleavage rapidly convert the zygote to a multicellular ball or disc |
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The cells of the blastula |
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A cavity that forms within the ball of cells |
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The pole of the egg where the polar bodies budded from the cell in mitosis |
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The half of the egg associated with the animal pole |
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The other half of the egg where the yolk is concentrated |
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The pole of the vegetal hemisphere |
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Made up of three embryonic germ layers: ectoderm, mesoderm, and endoderm |
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The embryonic germ layer that ultimately forms the digestive tract |
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Becomes the anus in deuterostomes Becomes the mouth in protostomes |
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The cells that remain on the surface of the embryo |
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Develops between ectoderm and endoderm |
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Extends from the dorsal edge of the blastopore to the anterior end of the embryo |
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The center of the plate that sinks |
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The edges of the plate become elevated |
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Formed when the the neural folds approach each other, touch, and eventually fuse |
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Contains species-species sperm receptors |
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Forms as a result of sperm-egg fusion and helps prevent multiple fertilizations |
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Blocks of tissue form from mesoderm along each side of the nerve cord |
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The release of oocytes into a single oviduct |
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Waste sack during development |
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