Question

A scientist is studying a form of marine bacteria growing in culture dishes. He noticed that a clear area formed around the mold where the bacteria that had grown in this area died (this is now referred to as a zone of inhibition). In the culture dishes that had no mold, no zones of inhibition were present. Formulate a valid hypothesis based on his observations.

A. The temperature in the lab was too cold for the mold to grow.

B. The mold must be producing a chemical that killed the bacteria.

C. The bacteria must be producing a chemical that killed the mold.

D. The temperature in the lab was too cold for the bacteria to grow.

Answer 1

Answer:

B. The mold must be producing a chemical that killed the bacteria.

Explanation:

This is a commonsense explanation rather than a scientific explanation but, it can't be A or B since that makes no sense... and C wouldn't be correct because the bacteria dies and if the answer would be C then why did the bacteria die if the bacteria killed the mold?

Answer 2

The answer would be B :)