Understanding Symbiotic Luminescence
Symbiotic luminescence refers to the production of light (bioluminescence) by microorganisms that live in a close, mutually beneficial relationship (symbiosis) with another organism, often a larger animal. The microorganism provides the light, and in return, it typically receives nutrients and a protected environment.
Microorganism Examples and Luminescence
Let's look at the options provided:
- Mycobacterium Spp: These bacteria are known for various roles, including some being pathogenic (causing disease), but they are not typically associated with bioluminescence or symbiotic light production.
- Vibrio fischeri: This bacterium is a classic example of a microorganism involved in symbiotic luminescence. Vibrio fischeri lives in the light organs of certain marine animals, such as the bobtail squid. The squid provides the bacteria with nutrients and shelter, while the bacteria produce a continuous glow, which the squid can use for camouflage (counter-illumination) or communication.
- Streptococcus pyogenes: This bacterium is known for causing infections like strep throat and scarlet fever. It does not possess bioluminescent capabilities.
- Staphylococcus aureus: Commonly found on skin and in nasal passages, Staphylococcus aureus can cause various infections but is not bioluminescent.
Identifying the Symbiotic Luminescence Example
Based on the known biological characteristics of these microorganisms, Vibrio fischeri is the only example listed that engages in symbiotic luminescence.
Conclusion
The microorganism that serves as an example of symbiotic luminescence among the given options is Vibrio fischeri.
Important Questions from Miscellaneous
A stone is thrown horizontally from the top of a 20 m high building with a speed of 12 m/s. It hits the ground at a distance R from the building. Taking g = 10 m/s2 and neglecting air resistance will give :
A mass is attached to a spring that hangs vertically. The extension produced in the spring is 6 cm on Earth. The acceleration due to gravity on the surface of the Moon is one-sixth of its value on the surface of the Earth. The extension of the spring on the Moon would be:
Directions: Each item in this section consists of a sentence with an underlined word followed by four words (a), (b), (c), and (d). Select the option that is opposite in meaning to the underlined word and mark your response in your Answer Sheet accordingly.
The deluge affected the population.The major source of vitamins and minerals for vegetarians is
Which of the following statements about the Deccan Riots Commission is/are correct?
1. The Commission did not hold enquiries in the districts which were not affected.
2. The Commission did record the statements of ryots, sahukars and eye-witnesses.
Select the correct answer using the code given below:
