In which of the following is the lower jaw toothless?

In a frog,which of the following is a part of the hindbrain?

The integument of the frog is always kept moist because

In frog,the surface of attachment of the tongue is

The epithelial lining of the respiratory system in a frog is derived from which germ layer?

Statement-$I$: In frog,eyes and internal ears are well-organised structures.
Statement-$II$: Sensory papillae,taste buds,and nasal epithelium are cellular aggregations around nerve endings.