1. | Scoliodon | 2. | Hippocampus |
3. | Chelone | 4. | Pteropus |
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1. | Metamerism appeared for the first time in annelida |
2. | Arthropods have jointed appendages and chitinous exoskeleton |
3. | Reptiles are endotherms |
4. | Forelimbs of birds are modifies into wings |
What is the number of animals, amongst the animals given below, that have both a four-chambered heart and endothermy?
Crocodilus, Aptendytes, Canis, Calotes, Struthio, Delphinus, Testudo, Ichthyophis
1. | 3 | 2. | 4 |
3. | 5 | 4. | 6 |
A typical reptilian heart is shown by the figure:
1. | 2. | ||
3. | 4. |