1. Bacteria are unicellular organisms, whereas Archaea are multicellular organisms.
2. Bacterias reproduce asexually, whereas Archaea reproduce sexually.
3. Both Bacteria and Archaea have a cell wall. 

How many of the statements given above are correct? 

1. In solids, generally, the heat is transferred by conduction.
2. In liquids and gases, the heat is transferred by convection.
3. Medium is required for the transfer of heat by radiation.

How many of the statements given above are correct?

1. Sunlight is scattered in all directions by all the gases and particles in the air.
2. Blue is scattered more than other colours because it travels as longer, bigger waves.