Bobtail squid form a symbiotic relationship with the marine bacterium Vibrio fischeri, which helps the squid avoid predation through bioluminescence. The bacteria only produce light when their colony reaches a certain size through a process called quorum sensing. Which of the following best describes how V. fischeri coordinates this light-producing response?
Individual bacteria directly transfer DNA to each other through conjugation tubes.
Bacteria use local regulators which bind to receptors on nearby cells and stimulate specific signal transduction pathways.
The squid's light organ releases hormones that stimulate the bacteria to produce light.
Bacteria communicate through plasmodesmata to coordinate light production.
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