Question

5 characters of metatherians????

Answer 1

Metatherians belong to a subgroup of the northern tribosphenic mammal clade or Boreosphenida. They differ from all other mammals in certain morphologies like their dental formula, which includes about five upper and four lower incisors, a canine, three premolars, and four molars.Other morphologies include skeletal and anterior dentition, such as wrist and ankle apomorphies; all metatherians share derived pedal characters and calcaneal features.
First proposed by Thomas Henry Huxley in 1880, it is a slightly more inclusive group than the marsupials; it contains all marsupials as well as many extinct non-marsupial relatives.
all metatherians share derived pedal characters and calcaneal features.

Answer 2

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✏️ the mode of breathing in metatherians is Viviparity.

✏️ pinna is present in metatherians

✏️ nipples are present in metatherians.

✏️ yolk sac placenta is in metatherians.

✏️ corpus callosum is absent or weakly developed

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