Question

All aquatic organisms have gills as part of their respiratory system.

Which of the following is true about the statement?

a) The statement is correct

b) The statement is incorrect as all aquatic organisms have lungs as part of their respiratory system

c) The statement is incorrect as al aquatic organisms rely on direct diffusion across their moist skin to exchange gases with their environment

d) The statement is incorrect as aquatic organisms use different methods of gas exchange, such as gills, lungs, and direct diffusion

Answer 1

D) The statement is incorrect as aquatic organisms use different methods of gas exchange, such as gills, lungs, and direct diffusion

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Answer 2

d) The statement is incorrect as aquatic organisms use different methods of gas exchange, such as gills, lungs, and direct diffusion.

An aquatic organism is the one which is either vertebrate or invertebrate, that lives in the water for it's entire life. An aquatic organism respire by either of the specialized organs like gills, lungs, or by diffusion through skin.

Although gill like organs are located in different aquatic organisms such as a mollusks, insects, fishes, crustaceans and amphibians but not all aquatic organisms such as diatoms and other zooplanktons do not exhibit gills they respire by simple diffusion process.

Therefore, All aquatic organisms have gills as part of their respiratory system is incorrect.