Question

Dissimilarity found in Aves and Mammalia is

• A. Warm blooded animal
• B. Lay eggs
• C. Breathe through lungs
• D. Four chambered heart

Answer 1

Answer: (B)

Lay eggs

Aves and mammals both are vertebrates and possess four chambered heart, warm blood and breath through lungs but Aves are oviparous, i.e., they lay eggs while mammals are viviparous, i.e., they give birth to young ones except platypus. Thus, the correct answer is option B.