Below are a few major topics for this chapter, listed in random order.

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• Fertilization in mammals. Hint
• Organogenesis: frog. Hint
• Organogenesis: chick. Hint
• Human embryonic development. Hint
• Gastrulation: sea urchin. Hint
• Fertilization in sea urchin. Hint
• Amniotic egg. Hint
• Embryonic germ layers of the gastrula. Hint

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Note: this is not a complete list of topics from which test questions will be drawn.