In frogs,where is the $Bidder's$ canal found?

Assertion: Heart of frog is muscular and three-chambered.
Reason: Heart of frog pumps mixed blood into lungs and body by conus arteriosus.

Which of the following is absent in a frog?

Choose the correct sentences for a female frog.
$1$. Vocal sacs are absent in female frogs.
$2$. $A$ mature female can lay $2500$ to $3000$ ova at a time.
$3$. In female frogs,fertilized eggs are encased in oothecae and it is a dark reddish to blackish brown.

The cloaca is.......

The renal portal system is made of