The Primary Excretory Product of Aquatic Gastropods Is

Question

The primary excretory product of aquatic gastropods is
A)urine.
B)urea.
C)ammonia.
D)uric acid.
E)guanine.

Accepted Answer

Aquatic gastropods excrete ammonia as their primary excretory product. Ammonia is highly soluble in water and can be easily eliminated through the gills or other respiratory surfaces. This allows aquatic gastropods to conserve water and avoid the energy expenditure required to convert toxic compounds into less toxic forms. Other animals, such as birds and reptiles, excrete uric acid as their primary excretory product, which requires less water but more energy to produce.