According to the natural history of disease model, the time before the precursors of disease and the host interact is called the period of:

A. mitochondrion b. nucleus

Many archeologists and anthropologists disagree with dr. thorne's view.  thorne strongly believes that what many calls "homo erectus"  was in fact  homo sapiens,  and that they migrated out of africa almost 2 million years ago and dispersed throughout europe and asia. that's way different  from what scientists have always believed about the evolution of the species.

Ibelieve the answer is b) aerosol inhalation may lead to heart attacks.