Name the ancestor of human also known as man with ape brain.

Answer

**Step-by-Step Solution:**

1. **Identify the Ancestor**: The question asks for the ancestor of humans that is referred to as "man with ape brain."

2. **Understanding the Term 'Hominoids'**: The ancestors of humans are classified under a group known as hominoids. This group includes various species that are closely related to humans and apes.

3. **Focus on Australopithecus**: Among the hominoids, Australopithecus is identified as a significant ancestor. It is known for having characteristics that are both human-like and ape-like.

4. **Characteristics of Australopithecus**:
- **Brain Size**: Australopithecus had a brain size similar to that of apes, approximately 450 cubic centimeters (cc), which is much smaller than modern human brains.
- **Bipedalism**: Australopithecus exhibited bipedal movement, meaning it walked on two legs, which is a key human-like feature.
- **Facial Structure**: The facial structure of Australopithecus was more human-like compared to apes, with a face that projected upward.

5. **Timeline and Location**: Australopithecus is believed to have existed around 3.7 million years ago, with fossils primarily found in Africa.

6. **Conclusion**: Due to its combination of human-like and ape-like features, Australopithecus is referred to as "man with ape brain."

**Final Answer**: The ancestor of humans known as "man with ape brain" is Australopithecus.

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