Sucker

(a) Hooks and suckers are present (b) Absorb nutrients from the host directly through their body surface (c) Specialised cells called flame cells help in excretion and osmoregulation (d) Sexes are separate Which of the above given charater is not related with diagram given below?

Mark te given statements True (T) or False (F) (i) All members of animalia are multicellular. (ii) Sponges exhibit tissue grade level of body organization (iii) A complete digestive system has two openings, mouth and anus. (iv) Annelids are pseudocoelomate animals. (v) notochord is an endodermally derived structure. (vi) all vertebrates are chordates. (vii) all chordates are vertebrates (viii) Polyps produce medusae asexually and medusae form the polyps sexually. (ix) Hooks and suckers are present in non parasitic flatworms (x) Lamprey dies after few days of spawning.

Assertion : External parasitism is generally marked by much more exterme specialisation than internal parasitism. Reason : The structure of an internal parasite is usually very complex possessing suckers, reproductive organs, etc.

Choose the correct combinations (a) Tubellaria-mostly free living flat worms with - convoluta mucus formating rhabdites in body wall (b) Trematoda - Comkmonly called flukes and bear - Bilharzia two suckers (c ) Cestoda -Ecto - and endoparasite , body segmented -Echinococcus (d) Phasmidia - Amphids -formating chemorceptor fucation -Trichuris