Question

The number of vertebrae presents in the frog, man, and rabbit respectively are
(a) 10,12,24
(b) 10,26, 46
(c) 10,33,46
(d) 10,26,33

Answer 1

Hint: In animals, chordates are highly evolved multicellular forms, which consist of solid flexible notochord lines between the central nervous system and alimentary canal. In higher chordates, the notochord is replaced by the jointed vertebral column.

Complete answer:
Frog consist of a total 10 number of vertebrae in which 7 are atlas which works as cervical vertebrae and show articulation with a skull, 2 form a vertebral column and it does not show articulation due to the absence of ribs, and the last vertebrae are urostyle which a tailbone but it remains fused due to absence of a tail.
The number of vertebrae in humans is 33 in number. It articulates with the skull, pectoral girdle, pelvic girdles, and ribs. The vertebrae are grouped into cervical vertebrae, thoracic vertebrae, lumbar vertebrae, sacral vertebrae, and coccygeal vertebrae. The cervical vertebrae is seven in number present in the neck region consisting of the first vertebrae axis and second vertebrae atlas. Thoracic vertebrae are 12 in number present at upper back position, which is larger and stronger than cervical. Lumbar vertebrae is 5 in number located at the abdomen region which is the strongest vertebrae in the vertebral column. Sacral vertebrae are 5 in number placed in the pelvic region, which is fused to form the sacrum. Coccygeal vertebrae are 4 in number which is fused, rudimentary triangular bone form coccyx.

Additional Information: The number of vertebrae in the rabbit is 46 in number. Neck consist of seven cervical vertebrae, thorax have 12 number of vertebrae in loin, in hip lumbar vertebrae is seven in number and tail consist of four sacral and three 16 coccygeal. All the vertebrae are bony with the presence of fibrous intervertebral discs between the vertebrae.
So, the correct answer is ‘10,33,46’.

Note: The number of cervical vertebrae in all mammals is the same, and it does not depend upon the size of mammals. But in the case of sloths and manatees, the number of cervical vertebrae is less than seven due to their low activity rates.