Sentence 1: There was a scientist who wanted to collect bacteria samples. 
 Sentence 3: The guy grabbed a plastic mold to put them in 
 Sentence 4:  The bacteria were then examined in a microscope 
 Sentence 5:  The bacteria was non harmful 
 Option 1: He collected some from his friend who had strep throat. 
 Option 2: The samples needed to be put somewhere.