1. | Body covered with moist skin which is devoid of scales, the ear is represented by a tympanum, alimentary canal, urinary and reproductive tracts open into a common cloaca |
2. | Freshwater animals with a bony endoskeleton and air bladder to regulate buoyancy |
3. | Marine animals with cartilaginous endoskeletons, bodies covered with placoid scales |
4. | Body covered with dry and cornified skin, scales over the body are epidermal, they do not have external ears |
Crocodile and Penguin are similar to Whale and Dogfish in which one of the following features?
1. | Lay eggs and guard them till they hatch |
2. | Possess bony skeleton |
3. | Have gill slits at some stage |
4. | Possess a solid single-stranded central nervous system |
1. | Scales on their hind limbs |
2. | Four-chambered heart |
3. | Two special chambers crop and gizzard in their digestive tract |
4. | Eggs with a calcareous shell |
Which of the following pairs are correctly matched?
Animals | Morphological features | |
A. | Crocodile | 4-chambered heart |
B. | Sea urchin | Parapodia |
C. | Obelia | Metagenesis |
D. | Lemur | Thecodont |
1. A, C, and D
2, B, C, and D
3. Only A and D
4. Only A and B