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All mammals have...

All mammals have

A

Mammary gland

B

Diaphragm

C

Vertebrae

D

All of these

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question "All mammals have," we need to analyze each of the provided options: mammary glands, diaphragm, vertebrae, or all of these. ### Step-by-Step Solution: 1. **Mammary Glands**: - Mammary glands are specialized organs found in female mammals. - They are responsible for producing milk to nourish their young. - Therefore, this option is correct as all female mammals possess mammary glands. 2. **Diaphragm**: - The diaphragm is a dome-shaped muscle that plays a crucial role in respiration. - It is the primary respiratory muscle in mammals and is unique to this class of animals. - The diaphragm separates the thoracic cavity from the abdominal cavity. - Thus, this option is also correct, as all mammals have a diaphragm. 3. **Vertebrae**: - All mammals belong to the subphylum Vertebrata, which means they possess a backbone or vertebral column. - The number of vertebrae may vary among different species, but the presence of vertebrae is a defining characteristic of mammals. - Therefore, this option is correct as well. 4. **Conclusion**: - Since all three options (mammary glands, diaphragm, and vertebrae) are present in mammals, the correct answer to the question "All mammals have" is option D: all of these. ### Final Answer: **D: All of these**
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