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key terms

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
mammal   a group of vertabrates  
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mammary gland   milk producing gland thing in the mothers body.  
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diaphragm   the combined action of the rib muscles and large muscles.  
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monotremes   egg-laying mammals  
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Marupials   mammals whose young are born at an early stage of development.  
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gestaion period   the lenght of time between fertlization and birth.  
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placental mammal   develpos inside its mothers body untill its body sytems can function independently.  
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placental   an organ of pregnant female mammals that passes materials between the mother and developing embryo.  
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