All mammals without any exception are characterized by
- Aviviparity and biconcave red blood cells
- Bextra-abdominal testes and a four-chambered heart
- Cheterodont teeth and $12$ pairs of cranial nerves
- Da muscular diaphragm and milk-producing glands
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Members of which of the following groups have three ossicles in their middle ear?
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View SolutionNote the following:
$I.$ Dentition is heterodont.
$II.$ Canines are poorly developed.
$III.$ Incisors are chisel-like,poorly developed.
$IV.$ Herbivorous and diastema is present.
$V.$ The dental formula is $I \frac{2}{1}, C \frac{0}{0}, P m \frac{3}{2}, M \frac{3}{3}$.
Which of the above are true for $Oryctolagus$?
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$II.$ Canines are poorly developed.
$III.$ Incisors are chisel-like,poorly developed.
$IV.$ Herbivorous and diastema is present.
$V.$ The dental formula is $I \frac{2}{1}, C \frac{0}{0}, P m \frac{3}{2}, M \frac{3}{3}$.
Which of the above are true for $Oryctolagus$?
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View SolutionThe unique mammalian characteristics are:
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