Provide definitions/explanations for the following terms:
$(i)$ Tadpole
$(ii)$ Urinogenital duct

(N/A) $(i)$ Tadpole: It is the larval stage in the life cycle of a frog that develops from the embryo. It is aquatic and undergoes metamorphosis to become an adult frog.
$(ii)$ Urinogenital duct: In male frogs,the ureters emerge from the kidneys and open into the cloaca. These ducts carry both urine and sperms,hence they are referred to as urinogenital ducts.