#Question id: 39075
#Life Sciences
Assertion (A): Birds have pneumatic bones.
Reason (R): Pneumatic bones reduce body weight and aid in flight.
#Question id: 39076
#Zoology
Assertion (A): Echinoderms show radial symmetry in adult stage.
Reason (R): Echinoderms have bilateral symmetry throughout life.
#Question id: 39076
#Life Sciences
Assertion (A): Echinoderms show radial symmetry in adult stage.
Reason (R): Echinoderms have bilateral symmetry throughout life.
#Question id: 39077
#Zoology
Assertion (A): Arthropods possess jointed appendages.
Reason (R): Chitin is the main component of arthropod exoskeleton.
#Question id: 39077
#Life Sciences
Assertion (A): Arthropods possess jointed appendages.
Reason (R): Chitin is the main component of arthropod exoskeleton.
#Question id: 39078
#Zoology
Assertion (A) : Mammals are endothermic animals.
Reason (R): Presence of hair and sweat glands helps in thermoregulation