Fact 1: Flatworms belong to the phylum Platyhelminthes. Fact 2: Parasitic flatworms have evolved a close association with their hosts. Given the two facts above, organisms belonging to the phylum Platyhelminthes have evolved a close association with their what?
OPT:
(1). ovaries.
(2). Wasps.
(3). life.
(4). plant.
(5). orchids.
(6). hosts.
(7). root system.
(8). tree host.
Answer:
(6).