Question

The diagram given here shows the skulls of two different mammals.
Which of the following accurately describes the differences between these skulls?

A) Skull A has more teeth than skull B
B) Skull A has more brain capacity than skull B
C) Skull A is of a human and skull B is of an ape
D) Skull A is an ape and skull B is human.

Answer 1

Cranium or skull is defined as a structure of the head. The skull supports the face and protects the brain. The skull is formed of several bones. The skull is composed of two parts: the cranium and the mandible.

Complete answer:
Apes generally have more projecting faces with the features like.

A larger brow ridge.
A longer face.
Larger teeth in front than in back and Larger jaws.
A posteriorly placed foramen magnum.
No forehead and chin
The teeth protrude out from their face and they have more teeth.
They U shaped dental arcades.
Zygomatic arch is larger in apes to accommodate temporal muscles.

Humans generally have more projecting faces with features like.

Forehead and chin
Relatively flat faces than apes.
Teeth are small and relatively regular in size in comparison to apes.
Smaller jaws than Apes
More v shaped dental arcade.
The brain capacity of ape is one third the size of the human brain.So the correct answer is Skull A has more teeth than skull B.Skull A is an ape and skull B is human.But the skull A has more brain capacity is wrong because skull B has more brain capacity.

Hence option ‘A’ is the correct answer.

Note: Humans, chimpanzees etc. form a family of the organisms called Hominidae. Apes are tailless primates who are close relatives of humans. Apes have a much larger brow ridge due to strain put on the cranium by their jaw muscles. The mandible is much larger in apes because of the more primitive diet. In humans, the chin has developed to protect a weak point in skulls.