Geothermal energy for heating. Solar power, or HydroElectric energy. The most efficient/Ideal one would HydroElectric energy. The reason why I say this is because HydroElectric energy does not pollute the environment, or produce harmful fumes. It also produces a lot of energy to power multiple homes.
The answer is all of the above
I need a picture of this graph to answer this question
The number of chromosomes is reduced in half from 46 to 23, the process that causes that effect is the meiosis process, because they have only half the total chromosomes in a somatic cell, they are termed haploid.