Question

Thecodont teeth are present in?
a) Sphenodon
b) Crocodiles
c) Mammals
d) Scoliodon
A) c only
B) b & c only
C) a, b and c only
D) a b, c & d

Answer 1

Hint: It is an anatomical description of the tooth morphology. The species are characterized by the presence of teeth with well-developed roots and teeth are implanted in the deep socket of jawbones.

Complete answer:
Thecodont teeth are present in crocodiles, mammals, and dinosaurs. It is a type of tooth present in the animals where the root of the teeth is firmly attached in the socket of the jawbone, an archosaurian characteristic that was inherited by the dinosaurs. This attachment is the strongest in the vertebrates. The species having thecodont detention do not lose their teeth easily.

Additional Information: -Thecodontia is an obsolete taxonomic group, used to describe a diverse “order” of early reptiles that first appeared in the latest Permian period.
-Thecodont detention is present in all mammals and some nonmammalian vertebrates.
-These organisms were probably the ancestors of the dinosaurs, pterosaurs, and crocodilians.
-These thecodont teeth, nesting in jaw alveoles, travel mainly along the upper jaw via the maxillar-jugal contact in the lower part of the snout module.
-Thecodonts are explained by certain shared primitive features, the suborbital fenestra and teeth in sockets.
So, the correct answer is ‘b & c only’.

Note: Based on types of attachment, teeth are divided into three types: Acrodont teeth – teeth having no roots and being fused at the base of the margin of the jawbones. Pleurodont teeth – teeth are arranged superficially but are anchored on the inside of the jaw. Thecodont teeth – teeth are attached to the socket of the jawbones.