Question

Pila is
A. Temple Shell
B. Apple snail
C. Pond Snail
D. Both B and C

Answer 1

Hint: Mollusks are the bilaterally symmetrical, triploblastic organisms. They have an organ-system level of body organization. Clams, snails, and squids are some of the representative organisms of this phylum of the animal kingdom. Pila belongs to the Family Ampullariidae or Pilidae of the class Gastropoda of mollusks.

Complete answer:
Mollusks are the organisms whose soft bodies are covered with a shell of calcium carbonate. They have a broad, muscular foot that serves in locomotion. Visceral mass houses all the internal organs and is covered with a thin sheet of tissues called the mantle.
The phylum Mollusca is divided into four main classes which are Polyplacophora, Gastropoda, Bivalvia, and Cephalopoda.
The class Gastropoda is the largest class of mollusks and includes aquatic or terrestrial animals. They are found in both marine and freshwater. Lymnaea (a gastropod) is also called pond snail. It has a spiral shell and all of its species are found only in freshwater. Conchs are the gastropods that are commonly called temple shells.
Pila is a genus of class Gastropoda. It is mostly found in freshwater bodies such as ponds, pools, lakes, and rivers. They are also adapted to survive on land habitat. Due to its shape, it is also called apple snail. Being a gastropod, it has a univalved coiled shell.

So, the correct answer is B. Apple snail.

Note: Defining feature of class Gastropoda is the presence of twisted visceral mass and nervous system during their embryonic development. It includes snails, slugs, and conchs. These mollusks have a well-developed head with eyes.