Answer: A (Mutualism)
Explanation:
The relationship between termites and cellulose digestive microorganisms is Mutualism. This is because Termites feed on cellulose, which they get from feeding on dry woods.
Termites themselves can not degrade cellulose but the depend on microorganisms in their guts. These microorganisms releases enzymes that solely degrade cellulose.
The symbiotic relationship between termites and cellulose digestive microorganisms is Mutualism because they both depend on each other for survival. Microorganisms would not survive outside of the termite, and the termite would not be able to degrade food if it didn't have cellulose digestive microorganisms to aid in digestion.
Answer:
Since there is presence of excess tryptophan, the trp operon will be switched off, since the bacterial need not to synthesize.
Explanation:
Understand the following.
The trp operon is a group of gene that encode biosynthetic enzymes for the amino acid tryptophan.
The transcription gene in the operon is switched off when the tryptophan is in excess but is switched on by the bacterium when the tryptophan is low, so that more tryptophan can be produced.