In frogs,the oviduct is formed by:

The sinus venosus of the frog is located on

Which vein drains blood from the back region in a frog?

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.

Which of the following is known as the pacemaker in the heart of a frog?

In frog,the sclerotic is: