Diversity of Life Forms-II — DU B.Sc. (Hons) Biological Sciences Previous Year Question Papers

Attempt four questions in all. Draw well labelled diagram wherever possible. 1. (a) Define the following (any four) : 4x1=4 (ii) Mesonephric kidneys Pneumatic bones • . (io) Living fossil (b) Differentiate the following (any three) : 3×2=6 (i) Chondrichthyes and Osteichthyes • (ii) Catadromous and Anadromous migration Flora and Monograph (iu) Natural and Artificial classification systems. (i) Acorn Worm (iii) Cobra. (d) Fill in the blanks (any three) : 3×1=3 (i) Jawless fish belong to class. • (it) APG stands for... (iii) Species Plantarum was published by.. (iv) The term 'taxonomy' was coined by.. 2. (a) Define Biodiversity. Explain various types of Biodiversity and comment upon their significance. 7 (b) What is herbarium ? Discuss about herbarium functions and important herbaria of India (any three) and world (any three). 8 (a) Write characteristic features of chordates. What are the distinguishing characteristics between Urochordata and Cephalochordata ? 8 (b) What is a key ? Give an account of dichotomous keys and their types with reference to plant identification. 7 Write general char.acteristics of class. Maqumalia. State the basis of classification of mammalian infraclass prototheria, metatheria and. (Zt) Describe the reprodqctive structures of GZ7z4go. 8 (cE) What are Zoogeographical realms ? Explain the various zoogeographical realms along with distribution of fauna in each realm. 8 6. (a) Explain Hutchinson's system of classification. Write merits and demerits Of Hutchinson's system of classification. Write. short notes on the following (any ffaree) : G) Main char.acteristics of Agnatha (I.I.i) Role of Botanical Gardens (ZtJ) Economic importance of Gymnosperms.