The below are exceptions to the cancellation and revision fees policy: In the event of death, of the ticketed passenger, a refund will be processed for the deceased and any traveling companion(s). Request must include a copy of the death certificate and submitted within one year of the original date of issue.
Phycomyces, a fungus, exhibiting phototropism. A tropism (from Greek ÏÏÏÏÎ¿Ï, tropos, a turning) is a biological phenomenon, indicating growth or turning movement of a biological organism, usually a plant, in response to an environmental stimulus.
tropism - an involuntary orienting response; positive or negative reaction to a stimulus source. 1  response, reaction - a bodily process occurring due to the effect of some antecedent stimulus or agent; a bad reaction to the medicine; his responses have slowed with age. 2  ergotropism - an affinity for work.