Answer:
One hypothesis would be "The inheritance of one trait does not affect the inheritance of another trait".
It can be explained with the help of law of independent assortment.
It states that the genes are randomly distributed in the gametes, that is, independent of each other.
Experimentally it can be tested with the help of dihybrid cross.
Because it is an Independent reaction where it is not dependant on solar energy
For an organism to function properly all the physiological factors should be favorable. These physiological factors include water level, pH, temperature etc. To perform the basic function of the life, it is important to maintain the physiological parameter in a particular range.
In case, these physiological parameters are not balanced, then the body of the organism does not perform well and causes illness.
So, the first blank can be filled with temperature and the second blank can be filled with range.