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Vocabulary practice, fish & amphibians

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Vocabulary practice - Prentice Hall Life Science, Chapter 12 Fish & Amphibians

A	B
vertebrate	animal with a backbone
gill	structure through which a water-dwelling animals obtain oxygen
coldblooded	having a body temperature that can change with the temperature of the environment
warmblooded	having a constant body temperature
external fertilization	fertilization that occurs outside the body of a female
internal fertilization	fertilization that takes place inside the body of a female
swim bladder	sac filled with air that enables bony fish to rise or sink in water
metamorphosis	change in appearance due to development

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