?What is the primary source of food for?marine life?
1). Phytoplankton
2). Zooplankton
3). Sea weed
4). Grass
1. A fixture is defined as a device which
5. The mass of proton and mass of ________ is same.
6. The mercury and sodium street lamps light up because of.
7. The freezing point of fresh water is ________ .
8. Pure water is bad conductor of electricity because it is
10. Pannalal Ghosh played which of the following musical instruments?