Is all phenotypic variation heritable? If not, provide an example of variation that is not heritable?

Ur very welcome for

The need activity of the nurse is to suction discharges from the trachea. current treatment approaches in the pressing consideration facilities or crisis offices are corticosteroids and nebulized epinephrine; steroids have demonstrated advantageous in extreme, direct, and even gentle croup. in the clear instances of croup, anti-microbials are not endorsed, as the etiology is viral

True but only in the south coastal areas during september and early october.