a
due to the comedy of the Earth and beautiful hydration of the earth beneath
The lac operon contains an operator, promoter, and structural genes that are transcribed together and are under the control of the catabolite activator protein (CAP) or repressor.The lac operon encodes for the genes needed to utilize lactose as an energy source. Answer is C
The Organism that the biologist observed was a part of the Porifera phylum.