1. Air sacs
2. Flapping of wings
3. Twisting of feathers
4. Shape of wings which is similar to aeroplane blades
Flapping of wings
1. C.V. Raman
2. Satyendra Nath Bose
3. Homi J.Bhabha
4. Narinder Singh Kapany
Narinder Singh Kapany
1. 212deg F
2. 100deg F
3. 180deg F
4. 32deg F
32deg F
1. Bat
2. Squirrel
3. Kangaroo
4. Duckbilled Platypus
Duckbilled Platypus
1. Less than 7
2. More than 7
3. Equal to 7
4. Equal to 0
Equal to 7
1. Hydrogen
2. Helium
3. Iron
4. Carbon
Hydrogen
1. Clay, sand and gravel
2. Humus, clay and gravel
3. Sand, humus and gravel
4. Humus, sand and clay
Humus, sand and clay
1. The days are longer and nights are shorter
2. The nights are longer and days are shorter
3. Days and nights are of almost equal duration
4. None of the above
Days and nights are of almost equal duration
1. Evaporation
2. Condensation
3. Both evaporation and condensation
4. Filtration
Both evaporation and condensation
1. Joule
2. Newton
3. Dyne
4. None of the above
Newton