iswearimimsane iswearimimsane

20-05-2016
Biology

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As various vertebrate groups evolved, the structure of the heart changed. Which of the following describes the heartsame of birds and mammals?
A) One atrium and one ventricle
B) Two atria and one ventricle
C) One atrium and two ventricles
D) Two atria and two ventricles

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Anaxo52 Anaxo52

21-05-2016

Two atria and two ventricles

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