The characteristics of modern man are

Options

A. Small teeth without large canines are slight curvature of vertebral column
B. Flattened face without muzzle and brow ridges
C. Rounded skull with downward looking foramen magnum
D. All of these

Answer

### Step-by-Step Solution:

1. **Understanding Modern Man**: Modern man, also known as Homo sapiens, exhibits several distinct anatomical and physiological characteristics that differentiate him from earlier hominins.

2. **Analyzing the Options**:
- **Option 1**: "Small teeth without large canines and slight curvature of vertebral column."
- Modern humans have smaller teeth compared to their ancestors, who had larger teeth and pronounced canines used for tearing flesh. The slight curvature of the vertebral column is due to the S-shaped structure that provides flexibility and support.

- **Option 2**: "Flattened face without muzzle and brow ridges."
- Modern humans have a more flattened face compared to earlier hominins, lacking a pronounced muzzle (prognathism). The reduction of brow ridges also contributes to a more subtle facial structure, facilitating social interactions.

- **Option 3**: "Rounded skull with downward looking foramen magnum."
- The skull of modern humans is rounded, and the foramen magnum (the hole through which the spinal cord passes) is positioned downward, indicating bipedalism and an upright posture.

3. **Conclusion**: All three options accurately describe characteristics of modern man. Therefore, the correct answer is:
- **Option 4**: "All of these."

### Final Answer:
The characteristics of modern man are all of the above (Option 4).

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