Salarias fasciatus , commonly known as the lawnmower blenny, are saltwater (mari

Question

Salarias fasciatus, commonly known as the lawnmower blenny, are saltwater (marine) fish that are often kept as pets in tropical marine tanks. If one of these animals were placed in a freshwater tank, its cells would:

shrink, as they would be hypotonic to their environment.

lyse, as they would be hypotonic to their environment.

plasmolyze, as they would be hypotonic to their environment

remain normal, as they would be isotonic to their environment.

shrink, as they would be hypertonic to their environment.

lyse, as they would be hypertonic to their environment.

plasmolyze, as they would be hypertonic to their environment

shrink, as they would be hypotonic to their environment.

lyse, as they would be hypotonic to their environment.

plasmolyze, as they would be hypotonic to their environment

remain normal, as they would be isotonic to their environment.

shrink, as they would be hypertonic to their environment.

lyse, as they would be hypertonic to their environment.

plasmolyze, as they would be hypertonic to their environment

Explanation / Answer

f- lyse as they would be hypertonic to their environment

Explanation:

Salaries fasciatus is a marine fish and is well adapted to remove excess salt from its body. We know marine water contain an excess of salt but marine animals are well adapted to these saline conditions. These animals have many mechanisms to exclude excess salt from their body. In Salarias fasciatus excess of salt is removed by absorbing water through gills and water goes to kidneys where the excess of salts are filtered and removed along with urine.

When this fish is kept in fresh water, it will try to absorb maximum water through gills. This water will enter cells and will cause cell swelling or plasmolysis. The water will move inside cells as they will have the higher solute concentration or in other words Hypertonic to their outer environment. The water will continue to enter until lysis, causing the death of fish ultimately

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