Question

pls. ans the que. fast.......

Answer 1

Oxygen only
Lungs
Gills
1/2
Skin
Protozoa
Frog
Haemoglobin
Haemoglobin
Earthworm
All
To keep skin wet and moist
Cockroach
Colourless
All
3
2
Pulmonary artery
Pulmonary vein
32
18
15
Branchial (common for a few of them)

Answer 2

20)1
21)2
22)1
23)4
24)1
25) 3
26)2
27)3
28)2
29)1
30)4
Hope this answer's help you