BZYCT-131(2020-21) EM ISC

ASSIGNMENTANIMAL DIVERSITYCourse Code: BZYCT-131Maximum Marks: 100Note: Attempt all questions. The marks for each question are indicated against it.Part-AMaximum Marks: 501.Fill in the blanks with suitable words: a)Digestion is ………………in Branchiostoma.b)Elasmobranchs have a ……………… mouth.c)The flagellated chamber of the canal system of sponges is lined by ……………… .d)The ………………of the filarial worm releasessmall microfilariae into blood and lymphatic system.e)The special comb-like sense organs of scorpions are ……………… .f)The fused pair of maxillae of millipedes is called ……………… .g)………………is the only living genus under the subclass Nautiloidea.h)In cephalopods a pair of ……………… hearts pump the blood through the gills.i)Nephridia are ……………… in hemichordates.j)The bipinnaria larva of ……………… is similar to tornaria larva.(10)2.Describe parental care in amphibians.(10)3.What isparasitic adaptation? Explain the adaptations that have taken place in Ascaris lumbricoides.(10)4.Write short notes on the following :a)Book lungs of Arachnida b)Pectines of scorpions (10)5.What is meant by torsion?Explain the process in detail. (10)Part-B Maximum Marks: 506.Sate whether the following statements are True (T) or False (F)i)Presence of cranium and paired appendages is a characteristic featureof Agnatha.ii)Gonangium is a sexual way of reproduction.iii)The excretory organs of crustaceans are called antennary or maxilliary (10)Assignment Code: BZYCT-131/TMA/2020-2021

4glands depending on their position. iv)The two pairs of insect wings are articulated with pro and mesothorax. v)The secretion of prothoracic glands regulates metamorphosis in insects. vi)Class Xiphosurais regarded as living fossil.vii)Development in bivalves includes trochophore and veliger larvae.viii)The blood of cephalopods contains haemocyanin.ix)In brittle stars tube feet aid in locomotion.x)Aristotle’s lantern is a complex chewing organ of sea urchin.7.Describe canal system in Porifera.(10)8.a)Write unique features of Phylum Ciliophora.b)State the affinities of Hemichordates with Echinoderms. (5)(5)9.Describe the important adaptations found in birds that allow them to fly.(10)10.a)Describe the most important adaptations in reptiles that allowed them to make a complete transition from water to land environment. b)Differentiate between the following pairs:i)Orders Perissodactyla and Artiodactylaii)Infra classes Eutheria and Metatheria.