The marsupials and eutherians are separated according to
A) length of gestation.
B) relative length of lactation.
C) presence or absence of a placenta.
D) birth of live young.
E) method of fertilisation.
Correct Answer:
Verified
Q21: Most amphibians return to water to lay
Q22: Amphibians are not amniotes because
A) the whole
Q23: In amniote tetrapods
A) metamorphosis is absent.
B) cleavage
Q24: Reptiles are not considered a monophyletic group.
Q25: Mammals are the only animals that
A) always
Q27: Primates can be classified into two groups
Q28: Which of the following is NOT a
Q29: Currently, the oldest genus to be classed
Q30: An exact relationship between the many hominid
Q31: The pharyngeal slits of early chordates were
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