Question

The most unique mammalian characterstic is/are

• A. The presence of milk producing glands (mammary glands)
• B. Heart is completely four chambered
• C. The presence of hair on skin
• D. Both $A$ and $C$

Answer 1

Answer: (D)

The most unique mammalian characteristic is the presence of milk producing glands (mammary glands) and the presence of hair on skin