This group of animals has three bones in the ear:
Correct answer: B. Mammals
- A. Reptiles
- B. Mammals
- C. Both reptiles and mammals
- D. Birds and mammals
Explanation
Modern mammals are unique among vertebrates for possessing three tiny bones in the middle ear. The malleus, incus, and stapes (commonly known as the hammer, anvil, and stirrup) work as part of a chain that transmits sound toward the skull. Birds and reptiles have only one bone to perform this function.
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About Kingdom Animalia
Animals are multicellular, heterotrophic eukaryotes whose cells lack cell walls and chloroplasts, with specialised tissues in most groups. Coverage includes body symmetry, tissue layers, coelom, segmentation and levels of organisation, plus major phyla such as Porifera, Cnidaria, Platyhelminthes, Annelida, Arthropoda, Mollusca and Chordata.
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