Question on: JAMB Biology - 2000
A characteristic of vertebrates that is unique to mammals is
A
the presence of pentadctyl limbs
B
parental care
C
the possession of scrotum
D
pulmonary circulation
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Correct Option: C
Mammals are unique among vertebrates in possessing a scrotum. The scrotum is an external pouch of skin that houses the testes, providing a cooler environment necessary for sperm production.
- A. The presence of pentadactyl limbs is a characteristic of all tetrapods, not just mammals.
- B. Parental care is seen in many vertebrates, including birds and reptiles, not just mammals.
- D. Pulmonary circulation is found in all vertebrates with lungs.
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