Question

Frog's teeth are
(a)Acrodont and polyphyodont
(b)Thecodont and polyphyodont
(c)Thecodont and homodont
(d)Heterodont

Answer 1

Hint: The teeth that are fixed on the jaw bone’s surface, where the teeth are located at the peak of the alveolar jawline, without sockets. The teeth are replaced several times in the lifetime of the animal.

Complete answer:
The frog has acrodont and polyphyodont. Details about these type of teeth have been given below -
Acrodont: As in fish and amphibians, the acrodont teeth are fixed to the top surface of the jaw bone. This kind of attachment isn't very strong and teeth are quickly lost and replaced with new ones.
Polyphyodont: Polyphyodont dentition requires multiple lifelong replacements of teeth so that the jaws are never left without teeth. Lower vertebrates with loose teeth attachment lose teeth when eating and catching prey and then the teeth have to develop again to replace the missing ones.

Additional Information:
Thecodont: Thecodont dentition occurs in animals where the root of the tooth is securely fixed in a jawbone socket, making the attachment strongest in the vertebrates. This is a peg and socket attachment that covers the root portion of the tooth with the aid of cementum.
Based on the teeth type, there exist two types of dentition. They are homodont and heterodont.
Homodont: Homodont dentition is present in most vertebrates, such as fish, amphibians, and reptiles, where all teeth are of the same form functionally and anatomically, but their size may differ depending on the location. Often some teeth may be functionally adapted as snack fangs.
Heterodont: Heterodont dentition occurs in mammals where there are 4 functionally distinct types of teeth, namely, flat cutting incisors, long and pointed canines for slicing flesh, and broad and short premolars and molars with a smooth grinding surface. In milk teeth, molars have no counterparts.
So, the correct answer is ‘Acrodont and polyphyodont’.

Note: For many amphibians including frogs, the teeth are called vomerine teeth that are located only in the upper jaw and that too only on the front side. The main role of these teeth is to hold the prey and not to chew the food. The frogs generally will swallow their prey without chewing.