Question

Dicondylic skull is present in
(a) Amphibians
(b) Reptiles
(c) Birds
(d) All of the above

Answer 1

Hint: In small vertebrates that require water or a moist atmosphere to live, the Dicondylic skull is present. Frogs, toads, salamanders, and newts are the species in this group. On land or sea, they can live.

Complete step by step answer:
Dicondylic skulls are known as the skull, which is connected to the body with two articulatory condyles. It is present in mammals and amphibians.
The skull has two occipital condyles in amphibia, and the skull is bound by the first vertebra of the vertebral column, i.e., atlas, with the aid of these two condyles. The round prominence at the end of a bone which forms an articulation with another bone is a condyle.
Typically, living amphibians have drastically reduced skulls, with many of the bones either missing or substituted by cartilage wholly or partially. The pedicellate teeth are seen in the skull, a trait of all amphibians. Most of their skulls are large and short, and they are also incompletely ossified. Given is the diagram of a frog skull:

So, the correct answer is, ‘(a) Amphibians’.

Additional information:
Monocondylic means a skull having a single condyle on the occipital. The Skull of reptiles is an example of this type.
Birds have only one occipital (monocondylic) condyle and can thus rotate up to 270 degrees in their heads.
- Amphibia has a dicondylic skull.
- Reptilia have monocondylic skull
- Aves possess a monocondylic skull.
- Mammalia has a dicondylic skull.

Note: The skeletal structure of the head that supports the face and protects the brain is the cranium (skull). It is divided into the facial bones, or cranial vault, and the case of the brain. The skull forms the skeleton's anterior- most section and is a result of cephalization. Skull functions include brain defense, stereoscopic vision allowing, and fi ears to enable sound localization of the direction and distance of sounds.