Question

The main excretory product of terrestrial insects is 1)uric acid 2)ammonia 3)amino acid 4) urea

Answer 1

Uric Acid
Because mainly terrestrial insects called uricothelics organisms convert toxic ammonia into uric acid and excrete it as excretory product
But many insects release ammonia , urea but MOST of TERRESTRIAL INSECTS release URIC ACID

Answer 2

"The main excretory product of terrestrial insects is uric acid, ammonia, and urea.

Terrestrial animals are combination aquatic and non-aquatic animals. These excrete nitrogenous wastes.

Terrestrial arthropods convert toxic ammonia into uric acid which is similar to guanine.

During a breakdown process of nucleic acids, mammals form uric acid.

Uric acid is found in the nucleic acids and it is insoluble in water and tends to form a "white paste or powder". Most of insects, birds, and reptiles excrete uric acid."