Which Organism Would Likely Harbor the Most Two-Component Regulatory Systems

Question

Which organism would likely harbor the most two-component regulatory systems?
A) an archaeon living in an extreme environment
B) a bacterium occupying a heterogeneous niche with high nutrient mixing
C) an organism capable of quorum sensing
D) a parasitic bacterium living inside another organism

Accepted Answer

Two-component regulatory systems are important for bacteria to perceive and respond to changes in their environment. Bacteria occupying heterogeneous niches with high nutrient mixing (such as soil or water) are likely to have the most diverse range of environmental cues to respond to and thus would require more two-component systems to effectively adapt to their surroundings.