Animal Kingdom Ques 64
64. One example of animals having a single opening to the outside that serves both as mouth as well as anus is:
(a) Octopus
(b) Asterias
(c) Ascidia
(d) Fasciola hepatica
Show Answer
Answer : d
Hints & Solutions
(d) Fasciola, a flatworm has a single body cavity opening to the outside that serves both as mouth for ingestion and anus for egestion of undigested food. This is known as blind sac plan.
BETA
