Question

1. if no vibrio fischeri are present in the environment, what is most likely to happen during the development of the bobtail squid? a. the squid does not mature into an adult. b. the light organ develops completely but does not glow. c. the light organ does not develop completely. d. the squid selects different prey as a source of food. 5. the bobtail squid and vibrio fischeri serve as model organisms for studying cellular communication. provide at least two examples of communication either between squid and bacteria or within bacteria from the film.

Explanation:

Vibrio fischeri colonize the light - organ of the bobtail squid and are essential for its full development. For question 4, without Vibrio fischeri, the light - organ will not develop completely. For question 5, quorum sensing in Vibrio fischeri is a form of communication within bacteria where they regulate gene expression based on cell - density. The squid provides a niche for the bacteria and in return, the bacteria help in light - organ development, which is a form of communication between the two organisms.

Answer:

1. c. The light organ does not develop completely.
2. 1. Quorum sensing in Vibrio fischeri: Bacteria regulate gene expression based on cell - density. 2. The squid provides a habitat for Vibrio fischeri and the bacteria help in the development of the squid's light - organ.