Question

Pila chiefly excretes...
a) ammonia.
b) uric acid.
c) ammonium compounds
d) urea.​

Answer 1

Answer:

b) uric acid.

Explanation:

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Answer 2

Answer:

• PILA GLOBOSA

The apple snail In other name called Pila globosa, is one of the largest freshwater molluscs. It's common in freshwater ponds, pools, tanks, lakes, marshes, rice fields, and even streams and rivers. They are found in areas where there is a lot of aquatic vegetation, such as Vallisneria and Pistia, for food. They are amphibious, meaning they can live in both water and on land.

Explanation:

• Pila globosa's renal chambers have a true excretory function and excrete nitrogenous waste products.
• The excretory products from the posterior chamber are collected and emptied into the anterior chamber via a single external opening, from which they are discharged into the pallial cavity via the external renal opening.
• The kidney is a coelomoduct that communicates with the coelom (pericardium) on one end and the exterior on the other (mantle cavity).
• The kidney excretes nitrogenous waste from the blood, which is then expelled into the mantle cavity.
• Excretory matter is chiefly ammonia, with traces of ammonium compounds, urea, and uric acid.

Therefore,

• OPTION (A) Ammonia is cheifly excreted. Hence, the option is Correct.
• OPTION (B),(C),(D) Uric acid, Ammonium compounds and Urea are also excreted but in traces; Hence, the options are Incorrect.