Which of these statements is true with respect to the anatomy of frog?

What types of tissues does the heart contain?

By which of the following do frogs do not respire?

What is the shape of the seventh sternum of the female cockroach?

Why are frogs not seen during peak summer and winter?

Which of the following is not true about nephridia in earthworm?

Earthworm is an invertebrate.

How many chambers are present in the heart of the frog?