Question

The structure associated with earthworm, cockroach, bony fish and birds are given below
in a series. Choose the correct series:
(a) Pneumatic bones, gills, Chitinous plates, metameres
(b) Gills, metameres, Chitinous plates, pneumatic bones
(c) Metameres, gills, Chitinous plates, pneumatic bones
(d) Metameres, Chitinous plates, gills, pneumatic bones

Answer 1

The answer is 

d). Metameres, Chitinous plates, gills, pneumatic bones.

Answer 2

it should be (d)
earthworm --- metameres due to its metameric segmentation in its body
cockroach--- body of cockroaches is covered by chitinous plates which u will further study in 11th
fishes---fishes respire through gills....at ur level
birds --- pneumatic bones is the characteristic feature of birds due to which it is able to fly