2012 AIPMT-MAINS Structural Organisation in AnimalsFrog and human comparison Easy Question 61 of 92 in Structural Organisation in Animals

Which one of the following characteristics is common both in humans and adult frogs?

A Ureotelic mode of excretion
B Four-chambered heart
C Internal fertilisation
D Nucleated RBCs

The answer is A.

Solution

Both humans and adult frogs excrete urea as the main nitrogenous waste, so both are ureotelic.
Heart: humans have a four-chambered heart, while the frog has a three-chambered heart (two atria and one ventricle).
Fertilisation: internal in humans but external (in water) in frogs.
RBCs: nucleated in the frog but without a nucleus in mature human RBCs.
Hence the common characteristic is the ureotelic mode of excretion.

Concept Ureotelism

Structural Organisation in Animals in past papers

92 questions from this chapter have appeared across 26 exam years.