Question

Why and how do crayfish excrete ammonia
Why and how do locusts excrete uric acid

Answer 1

Answer:

Excretion in most insects (and certainly locusts) is performed by the Malpighian tubules and rectum, functioning as a unit. Wastes (e.g., uric acid) and other metabolites are transported from the hemolymph into the lumen of the Malpighian tubules, along the hindgut to the rectum.