Question

Select the best answer for the question.

1. Which of the following is/are not a characteristic common to mammals?
O A. Seven cervical vertebrae
O B. Mammary glands
O C. Diaphragm
O D. Two-chambered heart

Answer 1

The two-chambered heart is not a characteristic common to mammals.

Step-by-step explanation:

The correct answer is D. Two-chambered heart. A two-chambered heart is found in fish, while mammals possess a four-chambered heart. Seven cervical vertebrae, mammary glands, and a diaphragm are all characteristics common to mammals.

Learn more about Characteristics of mammals