Adaptations of Vertebrates — NEET Biology
📚 Practice ConceptLimbs are absent in snakes. Fishes, amphibians and reptiles are poikilothermus (cold-blooded). Aves are warm-blooded animals with feathers on their bodies and forelimbs modified into wings for flying. Hind limbs are adapted for walking, swimming, perching or clasping. The unique features of mammals are the presence of mammary glands and hairs on the skin. They commonly exhibit viviparity.
Why do birds need a lightweight endoskeleton?
View solution & NCERT explanation
Correct answer: D — To aid in flight by reducing body weight
Birds possess pneumatic bones (hollow bones filled with air spaces) that reduce overall weight without sacrificing strength, which helps in flight.
What does NCERT say about Limbs are absent snakes?
Has this concept appeared in NEET?
Which chapter is this from?
Through deep analysis of NEET and NTA, 176 of the 180 ReNEET 2026 (June 21) questions were already in the MedicNEET question bank before the exam.
176/180MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.