Hollow-air filled bones (pneumatic bones) occur in:

What is true for Mammalia:

Which gland secretes odourous secretion in mammals:

1. Bartholins

2. Prostate

3. Anal gland

4. Liver-bile

One of the following is a very unique feature of the mammalian body:

1. Presence of diaphragm

2. Four-chambered heart

3. Rib cage

4. Homeothermy

Which of the following characters is not typical of the class Mammalia:

1. Alveolar lungs

2. Ten pairs of cranial nerves

3. Seven cervical vertebrae

4. Thecodont dentition