Based on cell differentiation, what it means when a gene can be "turned off" or "turned on", or not expressed is what we call INDUCIBLE GENES. Other genes are inducible having this characteristic. When a gene is inducible, this means it can be responsive to its external environment or not. Hope this helps.
A dominant part of aquatic animals like fish and prawns inhale through uncommon organs called gills.
The skin that help in utilizing oxygen broke up in water. which help in return of gases and Gills contain veins.
Amphibian life forms have a unique organ called gills, which permits them to inhale oxygen in the water.
The two sides of the pharynx (throat) by the Gills when the gases exchange in fish .
<em>Gills are tissues that resemble short strings, protein structures called fibers. </em>
These fibers have numerous capacities including the exchange of particles and water, just as the trading of <em>oxygen, carbon dioxide, acids and alkali.</em>
