1. how would the temperature changes in the atmosphere enough to affect the hydrosphere lithosphere and bisophere

If the temp.rises then it will lead to excessive evaporation in hydrosphere, on lithosphere it willl cause extreme hot conditions and with the scarcity of water the animals, birds will die and also plants will be affected.Hydrosphere and lithosphere are included in biosphere so it willl altogether effect biosphere...

C) to ensure each new cell has an exact copy of the dna