2. Coral Island is familiar to us. This Islan is formed by the specific members of specific phylum. Again animal kingdoms are classified on the basis of coelom.
3. The sequences of heart chambers of animal kingdoms are one, two, three, incomplete four and four.
4. The heart of Rui fish is two chambered. It is called venous heart. But our heart is developed and four chambered.
5. The chewable mouthparts and vision mechanism of locust mentioned in the syllabus are unique.