Dogs mark their areas by
Black deer belongs to which of the following category of creatures?
How many chambers are present in Crocodile's heart?
Consider the following animals -
1. Cartilaginous fishes
2. Frogs
3. Crocodiles
Which of the above animals’ heart auricle consist of single chamber?
The jawless vertebrates are known as -
How many occipital condyle (s) should be there in the skull of a snake?