There are seven cervical vertebrae in almost

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(D) $1)$ Most mammals have $7$ cervical vertebrae. There are a few exceptions as follows:$a.$ $2$-toed sloth $= 6$ cervical vertebrae.$b.$ Manatee $=

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All mammals

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(D) $1)$ Most mammals have $7$ cervical vertebrae. There are a few exceptions as follows:$a.$ $2$-toed sloth $= 6$ cervical vertebrae.$b.$ Manatee $= 6$ cervical vertebrae.$c.$ Anteater $= 8$ cervical vertebrae.$d.$ $3$-toed sloth $= 9$ cervical vertebrae.$2)$ Amphibians have only $1$ cervical vertebra,which is the atlas.$3)$ Reptiles have a variable number of cervical vertebrae,not consistently $7$.

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The number of floating ribs in humans is ............ . (in $pairs$)

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Match the following:
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$II.$ Coccygeal
$III.$ Thoracic
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$V.$ Lumbar

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