Which of the following structures of a fish is homologous with the lung of a frog?

Seymouria is a connecting link between . . . . . . .

Analogous organs are those which are

Appearance of ancestral characters in the newborns,such as tail,monstral face,gill slits,multiple mammae,etc.,are known as:

Which fish, caught in South Africa in $1938$, was thought to be extinct?

Assertion: Comparative biochemistry provides strong evidence in favour of the common ancestry of living beings.
Reason: The genetic code is universal.