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.
The answer would be C The mold is most likely an antibiotic which produces substances harmful to the strain of bacteria and therefore any bacteria in its zone of inhibition will die as a result
Correct answer: B.) The mold must be producing a chemical that killed the bacteria.
Antibiotics is an antimicrobial substance that is used against bacterial infection. They work to inhibit the growth of bacteria either by slowing the growth of bacteria or by killing them. They are not used against viral infections like common cold or flu.
Penicillin was first antibiotics that were discovered by Alexander Fleming while working in the lab with the mold <em>Penicillium notatum</em>
Mucus is what makes a frog feel slippery or slimy. Frogs don't drink water, instead they absorb it through their skin. Frogs also use their skin to breathe. A layer of mucus on the skin helps keep moisture trapped next to it, and this moisture transfers oxygen into the frog's body.
THe carbon gases generally the carbon dioxide gas and CFC's are called greenhouse gases which are referred to as toxic gases in the atmosphere. These gases contribute to the thinning of the ozone layer which can lead to the warming of the Earth since the ozone protectst the Earth from the heat and warmth of the sun
