Character closely related to human evolution:
A. Disappearance of tail.
B. Reduction in jaw size.
C. Binocular vision.
D. Flat nails.
Explain.?

Question

Character closely related to human evolution: A. Disappearance of tail. B. Reduction in jaw size. C. Binocular vision. D. Flat nails. Explain.?

Answer

Dissaperance of tail is the crucial in human evolution. Humans differ from most primates in that they lack a tail.

Hence A is right one.

Answer

Humans differ from most primates in that they lack a tail. The lower primates have tails, and the apes, which are believed by many to be our closest relatives, likewise are tailless.....so according to this option A is correct

Answer

Disappearance of tail:
The disappearance of the tail is a significant characteristic related to human evolution. It is believed that our early primate ancestors possessed long tails similar to those found in modern-day monkeys and apes. However, over time, the tail gradually diminished and eventually disappeared in humans. This evolutionary change can be attributed to several factors:

1. Adaptation to a bipedal lifestyle: As our early ancestors began to walk on two legs, the tail became less necessary for balance and locomotion. The development of an upright posture and the need for efficient movement on two limbs led to the gradual reduction and eventual loss of the tail.

2. Increased brain size: As human brains evolved and grew larger, there was a need for a more complex neural network. This required a reorganization of the spinal cord and the elimination of the tail. The absence of a tail allowed for the development of a more sophisticated nervous system to support higher cognitive functions.

Reduction in jaw size:
The reduction in jaw size is another characteristic closely related to human evolution. The evolution of smaller jaws can be attributed to several factors:

1. Changes in diet: Our early ancestors primarily consumed a diet consisting of raw, tough foods. However, as humans started to use tools and develop cooking techniques, the need for powerful jaws to chew and process food decreased. With the advent of a softer and more easily digestible diet, the selective pressure for large jaws diminished.

2. Speech and language development: The reduction in jaw size allowed for the repositioning of the larynx and the development of complex vocal apparatus necessary for speech. A smaller jaw provided more space for the tongue and vocal cords, enabling the production of a wide range of sounds and facilitating the evolution of language.

Binocular vision:
Binocular vision, the ability to perceive depth and distance accurately, is another characteristic closely associated with human evolution. This visual adaptation can be explained by the following factors:

1. Depth perception: Binocular vision, achieved through the overlapping fields of view from both eyes, provides humans with enhanced depth perception. This is crucial for activities such as hunting, gathering, and navigating complex environments.

2. Hand-eye coordination: Binocular vision allows for precise hand-eye coordination, enabling humans to perform intricate tasks such as tool use, crafting, and manipulating objects with accuracy. This ability has been instrumental in the development of our complex tool-making abilities and technological advancements.

Flat nails:
The presence of flat nails is another characteristic closely linked to human evolution. The transition from claws to nails can be attributed to the following factors:

1. Improved dexterity: Flat nails provide humans with increased finger sensitivity and fine motor control. This allows for more precise manipulation of objects and enhances our ability to perform intricate tasks.

2. Tool use: The development of flat nails coincided with the emergence of tool use in early humans. Nails provided a better grip and increased functionality when handling tools, improving their effectiveness for various tasks such as hunting, crafting, and gathering.

In summary, the disappearance of the tail, reduction in jaw size, binocular vision, and the presence of flat nails are all significant characteristics closely related to human evolution. These adaptations have played a crucial role in

Answer

A

Similar NEET Doubts

Which one of the following features is closely related with the evolution of humans?[2000]

Eyes of frogs are adapted for

An evolutionary pattern characterized by increase in number and kind of closely related species is a. convergent evolution b. divergent evolution c. adaptive radiation d. both b and c?

Rabbit has

What was the most significant trend in the evolution of modern man(Homo sapiens) from the ancestors?

Top Courses for NEETView all

Biology Class 11

Daily Test for NEET Preparation

NEET Mock Test Series 2025

Topic-wise MCQ Tests for NEET

Physics Class 11

Top Courses for NEET

Top Courses for NEET

Suggested Free Tests

Related Content

About NEET

NEET Preparation Material

How to Prepare for NEET Exam?

NCERT Based Study Material

NEET Mock Tests

Other Popular Exams

Company