All are true about Helminths, except?
Ans. is 'd' i.e., Body cavity is present in trematodes Alimentary canal is absent in trematodes Option b is absolutely incorrect Body cavity is absent in trematodes. Option d is also incorrect, but we can consider here it as paially correct because though the alimentary canal is present in trematodes, it is incomplete with no anus. Thus, option b is the best answer here (though option d is also incorrect) :? Table showing the differences between Cestodes, Trematodes and Nematodes Cestode Trematode Nematode Shape Tape-like; segmented Leaf-like; unsegmented Elongated, cylindrical; unsegmented Sexes Not separate, i.e., herma- phrodite (monoecious) Not separate (Monoe? cious), except Schisto? somes which are diecious Separate (diecious) "Head" End Suckers, often with hooks Suckers, no hooks No suckers, no hooks Well-developed buccal capsule in some species Alimentary Absent Present but incomplete Present and complete canal no anus anus present Body cavity Absent Absent Present
Alimentary canal is complete in Nematodes
Body cavity is present in trematodes
Nematodes have separate sexes
Alimentary canal is absent in trematodes