Question

A scientist eliminated all living organisms in a jar of soup by heating it. He then left the soup jar uncovered for some days. After a few days, he saw molds in the soup. What most likely formed the mold?

Mold spores present around the jar
Nonliving matter in the environment
Water molecules in the soup
Glass particles in the jar

Answer 1

Basically,

Spores in the air or contamination through some sort of insect interaction. When in an open system it's most likely its contaminated.
So it would most likely be A "Mold spores present around the jar"