Previous Year Question
‘Biorock technology’ is talked about in which one of the following situations?
Restoration of damaged coral reefs
Development of building materials using plant residues
Identification of areas for exploration/extraction of shale gas
Providing salt licks for wild animals in forests/protected areas
Correct Answer: A
Detailed Solution
Biorock technology is also known as mineral accretion technology. It is used for restoring damaged coral reefs and other marine ecosystems.
In this process, a conductive metal framework is placed on the seabed and a safe, low-voltage direct electric current is passed through it.
Under the influence of the electric current, dissolved calcium and magnesium minerals in seawater begin to accumulate on the metal framework. This produces a hard, limestone-like mineral layer known as Biorock.
Small fragments of living coral are attached to this mineral-coated framework. It provides a stable base for the corals and helps increase their growth, healing and resistance to adverse environmental conditions.
In addition to corals, this technology can assist the restoration of habitats associated with seagrass, mangroves, oysters and other marine organisms.
The other options are unrelated to Biorock technology. It is not used to manufacture building materials from plant residues, identify shale-gas areas or provide salt licks for wild animals.