Ancestor of man who first time showed bipedal movement

Options

A. Cro-magnon
B. Austraiopithecus
C. Java apeman
D. Peking man

Answer

**Step-by-Step Text Solution:**

1. **Understanding the Question**: The question asks for the ancestor of man that first exhibited bipedal movement. Bipedalism refers to the ability to walk on two legs, which is a significant characteristic of human evolution.

2. **Identifying the Options**: The options provided are Cro-Magnon, Australopithecus, Java Ape Man, and Peking Man. We need to analyze which of these ancestors is known for showing bipedal movement first.

3. **Researching Bipedalism**: Bipedalism is believed to have evolved before the development of large brains and stone tools. This suggests that the ability to walk on two legs was an early adaptation in human evolution.

4. **Fossil Evidence**: Fossils of Australopithecus, which date back to approximately 4.2 to 3.9 million years ago, show clear evidence of bipedalism. This indicates that Australopithecus was capable of walking upright.

5. **Comparing Other Options**:
- **Cro-Magnon**: This is a term used for early modern humans, who lived much later than Australopithecus.
- **Java Ape Man**: This refers to Homo erectus, which also walked upright but came after Australopithecus.
- **Peking Man**: This is another name for Homo erectus, similar to Java Man, and also lived after Australopithecus.

6. **Conclusion**: Based on the fossil evidence and the timeline of human evolution, Australopithecus is recognized as the ancestor that first exhibited bipedal movement.

**Final Answer**: Australopithecus is the ancestor of man who first showed bipedal movement.

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