Planaria,liver fluke,and Taenia solium are:

Bilaterally symmetrical and acoelomate animals are exemplified by

Pseudocoelom is not found in

Which of the following animals is triploblastic?

During its life cycle,the liver fluke ($Fasciola$ $hepatica$) infects its intermediate host and primary host,respectively,through which of the following larval stages?

In the life history of the liver fluke,the following stages are present: $(1)$ Cercaria,$(2)$ Metacercaria,$(3)$ Sporocyst,$(4)$ Redia,$(5)$ Miracidium. What is their proper sequence?