Question

141).in which of the following animals, single opening is used for both
ingestion and egestion while removal of metabolic waste products is
through body wall?
1.Hydra and Obelia
2.Taenia and Fasciola
3.Nerels and Hirudinaria
4.Limulus and Locusta​

Answer 1

Answer:

4. limulus and locusts is singhle opening for both