Which of these is a cellular aggregation in frog?

The epidermis of earthworm is made of __

Where does the urinogenital duct open in the case of frogs?

The simple epithelium consists of two or more cell layers and has a protective function.

How many ovaries are present in an earthworm?

Cockroaches are ____

How many legs are there in each thoracic segment of a cockroach?

Which of this is not a distinguishing feature of a male frog?