Try this out --Class 9th

Chapter ---Diversity in the living world

Salient features of vertebrata
Definitions of Coelom, Bilateral symmetry and radial symmetry
Open circulatry system(examples of organisms showing open circulatory system)
Difference between bony and cartilagenous fish
Difference b/w male and female cockroach
Difference b/w culex and anopheles mosquito(in terms of shape of eggs , feeding habits etc.)

“Don't wish it were easier. Wish you were better.”