Question

Which of the following is a significant trend in human evolution ?

• A. Upright posture
• B. Binocular vision
• C. Increasing cranial capacity
• D. All of these

Hint:

Human evolution is marked by significant changes such as walking upright, the development of binocular vision, and the enlargement of the brain.

Answer 1

The Correct Option is D

Step 1: Analyze each trend in human evolution.
- Upright posture: The ability to walk upright is one of the significant traits that define human evolution. This adaptation allowed early humans to free their hands for tool use and carrying objects. - Binocular vision: Binocular vision, which allows for depth perception, is essential for hunting and moving through various terrains. It is a critical evolutionary trait. - Increasing cranial capacity: The increase in brain size relative to body size has been one of the most important factors in human evolution. Larger brains allowed for more complex thought, problem-solving, and communication.
Step 2: Conclusion.
All of these traits—upright posture, binocular vision, and increasing cranial capacity—have played significant roles in human evolution, making (D) the correct answer.
Final Answer: \[ \boxed{All \; of \; these} \]