The platypus and echidna are the only living forms of ________ mammals.
A) prototherian
B) therian
C) eutherian
D) none of the above;they are not mammals
Correct Answer:
Verified
Q62: An example of a metatherian mammal is
Q63: Mammals are characterized by a:
A)diaphragm
B)hard palate
C)four-chambered heart
D)all
Q64: The acronym for the proposed common ancestor
Q65: Humans would be classified as:
A)therian mammals
B)eutherian mammals
C)placental
Q66: Some biologists see the primate order as
Q68: Metatherian mammals are found primarily in:
A)Australia
B)Africa
C)North America
D)all
Q69: The prototherian mammals:
A)lay eggs and do not
Q70: The development of an organism from conception
Q71: Mammals are divided into three groups on
Q72: Hox genes:
A)are regulator genes that among other
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