FIB : ____ ____ is known as hydrostatic organ of fishes

Question

1.  ____ ____ is known as the hydrostatic organ of fishes.
2. Rohu is an ____ animal.
3. Gills are an adaptive character of ____ animal.
4. Modification of ____ limbs forms wings.
5. The presence of feathers is the characteristic adaptive feature of ____.

Answer

1. Swim bladder
2. Aquatic
3. Aquatic
4. Forelimbs
5. Birds