SCIENCE
ZOOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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1 and 2
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1 and 3
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2 and 4
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3 and 4
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Detailed explanation-1: -STRUCTURE OF THE VERTEBRATE SKULL. The neurocranium is the portion of the skull that protects the brain and certain sense organs. In the Elasmobranchs (sharks and rays) it is composed of cartilage (chondrocranium), but in most other vertebrates, the cartilage is replaced by bone (endochondral or replacement bone).
Detailed explanation-2: -It belongs to the group of vertebrates called mammals. Its bony skeleton has features shared by most other vertebrates, including a backbone, a skull, jaws, a ribcage, and limbs.
Detailed explanation-3: -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.
Detailed explanation-4: -neurocranium (also called endocranium or primary braincase) dermatocranium (membrane bones) splanchnocranium (or visceral skeleton)