Question

Vertebrates vary widely in appearance and they are further divided into different classes according to some characteristics. The correct order of evolution of these characteristics is

• A. Jaws -> Lungs -> Hair -> Amniotic -> Eggs
• B. Teeth -> Paired appendages -> Legs -> Hair
• C. Teeth -> Lungs -> Paired appendages -> Hair
• D. Lungs -> Jaws -> Legs -> Teeth

Answer 1

Answer: (C)

Teeth -> Lungs -> Paired appendages -> Hair

Vertebrates vary widely in appearance and they are further divided into different classes according to some characteristics. Some of these characteristics developed earlier than others and some are still undergoing evolutionary changes. Out of the options given, teeth evolved first, followed by lungs, paired appendages and then hair.

So, the correct answer is 'Teeth -> Lungs -> Paired appendages -> Hair'.