Question

Teeth of Frog are
a. Acrodont and isodont
b. Thecodont and isodont
c. Acrodont and heterodont
d. Thecodont and heterodont

Answer 1

Teeth are hard structures found in many vertebrates, where they are placed on the jaws, and their main function is chewing the food, and for hunting the food, and some animals use teeth for the protective purpose also.

Complete answer:
- Teeth are hard structures, but they are not formed from the bones, and they are developed from multiple tissues of varying structures, which are developed from embryonic mesoderm.
- In all vertebrates, teeth are not the same, they vary in various forms.
- If the teeth are formed only once in their lifetime, then it is called Monophyodont.
- If the teeth are formed many times in the life span then it is called polyphyodont, and the example of polyphyodont is a shark, where their teeth are lost and form almost every week.
- Like in the mammals, teeth are not always attached to the jaws in remaining animals, they may vary.
- For example in the fish and reptiles, teeth are attached to the palate.

Frogs
- In amphibians, they have pedicellate teeth, which means they can be modified to be flexible, due to the presence of connective tissue and uncalcified dentin.
- The shape of all teeth is the same, and they all look similar, so they are called homodont or isodont.
- They have only a single attachment to the jaw, so they are called acrodont.
- They use teeth for grasping the food, but not for the crushing.

Hence, the correct answer is option (A).

Note: Normally in amphibians, teeth are lost when they are feeding and if the prey is struggling, and some amphibians teeth can undergo metamorphosis, where they develop the bicuspid shaped teeth.