5. Which chordates are thought to be the most recent mammalian group to have evolved, with live birth, and a placenta to provide oxygen to the developing embryo (over a relatively long gestational period)? A. the prototherians (including the spiny echidna) B. the metatherians (including the kangaroo) C. the monotremes (including the platypus) D. the marsupials (including the opossum) E. the euthdrians (including the beaver)

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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5. Which chordates are thought to be the most recent mammalian group to have evolved, with live birth,
and a placenta to provide oxygen to the developing embryo (over a relatively long gestational period)?
A. the prototherians (including the spiny echidna)
B. the metatherians (including the kangaroo)
C. the monotremes (including the platypus)
D. the marsupials (including the opossum)
E. the euthdrians (including the beaver)
Transcribed Image Text:5. Which chordates are thought to be the most recent mammalian group to have evolved, with live birth, and a placenta to provide oxygen to the developing embryo (over a relatively long gestational period)? A. the prototherians (including the spiny echidna) B. the metatherians (including the kangaroo) C. the monotremes (including the platypus) D. the marsupials (including the opossum) E. the euthdrians (including the beaver)
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