NEET Biology: Biology - Animal Kingdom questions with solutions

Q1. Animals having a built-in thermostat to maintain constant body temperature are known as

1. Biothermic
2. Poikilothermic
3. oligothermic
4. Homoeothermic

Answer: Homoeothermic

Homoeothermic animals regulate and maintain a nearly constant internal body temperature. This is the defining feature of a built-in thermostat, unlike poikilothermic animals whose temperature changes with the surroundings.

Q2. Poisonous fangs of a snake are modified

1. Mandible
2. Maxillary teeth
3. canines
4. Nasals

Answer: Maxillary teeth

Snake fangs are modified maxillary teeth because they develop from the upper jaw’s maxilla. They are not mandibles, canines, or nasal bones.