Lesson 17: Biology B Reproduction – Flashcards
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Parthenogenesis is a method of reproduction in which
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an egg develops without being fertilized by a sperm
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In sponges, internal fertilization occurs when
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the sperm is taken in from the surrounding water
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External fertilization in chordates
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must take place in water
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Synchronizing gamete release during external fertilization increases the chances that
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eggs will be fertilized
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One important characteristic shared by all embryos of land vertebrates and aquatic vertebrates is that
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they all develop in a watery environment