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Ear ossicle, incus is modified (a) Juga...

Ear ossicle, incus is modified
(a) Jugal
(b) Articular
(c) Quadrate
(d) Hyomandibular

A

Jugal

B

Articular

C

Quadrate

D

Hyomandibular

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the modification of the ear ossicle incus, we can follow these steps: ### Step-by-Step Solution: 1. **Identify the Ear Ossicles**: - Understand that there are three main ear ossicles in mammals: malleus, incus, and stapes. 2. **Focus on Incus**: - The question specifically asks about the incus, which is one of the three ossicles. 3. **Research the Origin of Incus**: - The incus has evolved from a specific bone in the jaw of ancestral vertebrates. 4. **Determine the Correct Bone**: - The incus is a modified form of the quadrate bone, which is found in the upper jaw of certain vertebrates. 5. **Eliminate Other Options**: - The other options (jugal, articular, hyomandibular) do not correspond to the evolutionary origin of the incus. 6. **Conclude the Answer**: - Based on the information, the correct answer to the question is (c) Quadrate. ### Final Answer: The incus is modified from the **Quadrate** bone. ---
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