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.
the outside that serves both as mouth as well as anus
is
(a) Octopus (b) Asterias
(c) Ascidia (d) Fasciola.