
Snakes possess external ears.
A. True
B. False
Answer
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Hint: Snakes belong to the suborder Serpentes. They are elongated, carnivorous reptiles found in all continents except Antarctica. Snakes are ectothermic, amniote vertebrates with bodies fully covered by scales. They are limbless animals with no distinct external organs. Many species of snakes have skulls with highly mobile jaws which enables them to swallow prey much larger than their size.
Complete explanation:
Option A True: This option is wrong since the snake does not have any external ear.
Option A is incorrect.
Option B False: The statement that snakes possess external ears is false because snakes do not have both an outer ear (external ear) and middle ear. There are small holes present on the sides of their head that act as ear openings. Inside the ear hole an inner ear is found with no tympanic membrane. The inner ear is connected to the jaw by a single middle ear bone.
The inner ear of the snake is filled with air while most other animals have fluid-filled inner ears. This enables snakes to hear vibrations but not sounds transmitted through the air.
Snakes can hear only a narrow range of frequencies. They cannot hear high frequencies, because those sounds are mostly transmitted through air. For example, royal pythons can hear frequencies between \[80\] and \[160\] Hertz. Whereas, the normal human frequency range is \[20{\text{ }}Hz - 20,000{\text{ }}Hz\].
Option B is correct.
Therefore, Option B) False is the correct answer.
Note:
Ears are made up of three major parts. The outer ear focuses sound to the eardrum. The eardrum separates the outer ear and the middle ear. The middle ear contains three bones that transmit sound from the eardrum to the inner ear through vibrations. The inner ear turns the vibrations into nerve impulses that travel to the brain.
Complete explanation:
Option A True: This option is wrong since the snake does not have any external ear.
Option A is incorrect.
Option B False: The statement that snakes possess external ears is false because snakes do not have both an outer ear (external ear) and middle ear. There are small holes present on the sides of their head that act as ear openings. Inside the ear hole an inner ear is found with no tympanic membrane. The inner ear is connected to the jaw by a single middle ear bone.
The inner ear of the snake is filled with air while most other animals have fluid-filled inner ears. This enables snakes to hear vibrations but not sounds transmitted through the air.
Snakes can hear only a narrow range of frequencies. They cannot hear high frequencies, because those sounds are mostly transmitted through air. For example, royal pythons can hear frequencies between \[80\] and \[160\] Hertz. Whereas, the normal human frequency range is \[20{\text{ }}Hz - 20,000{\text{ }}Hz\].
Option B is correct.
Therefore, Option B) False is the correct answer.
Note:
Ears are made up of three major parts. The outer ear focuses sound to the eardrum. The eardrum separates the outer ear and the middle ear. The middle ear contains three bones that transmit sound from the eardrum to the inner ear through vibrations. The inner ear turns the vibrations into nerve impulses that travel to the brain.
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