Entomology — DU B.Sc. (Prog.) Applied Life Sciences with Agrochemicals and Pest Management pertaining to Zoology Previous Year Question Papers

Agro Chemicals and Pest Management Attempt 4 questions in all. Draw well labelled diagram wherever possible. 1. (a) Define the following : 4 Mosaic vision (io) Air sacs (b) Differentiate between the following (any two) : 4 Trichoid and Campaniform sensilla (ii) Suture and Suleus • (iii) Instar and Stadium (io) Chitinous wing and Membranous wing - " (c) Give the location and function of the following : 4 (i Malpighian tubules (iii) Silver fish 2. (a) Name the different organs/structures involved in the excretion in insects. Explain the physiology of excretion, in the primary organs in detail with the help of suitable diagram. 8 (b) Give an account on functional morphology of mouth parts found in the house fly and honey bee. 7 (a[) Describe morphology Of a leg in typical insect and its modifications. 8 (Z}) What is metamorphosis ? Give an account on the types of metanolphosis with examples. (a) (a) (a) Give an account on respiration-in terrestrial insects with diagram 8 Write characteristics of class Insecta with suitable examples. 7 .Describe in detail the stmcture and physiology of the three .main regions of the insect alinentary carnal in.insects. 8 (a) Describe the morphology of thorax in -a typical winged insect. 7 Write short notes on any £.7iree Of.the following : (i) .Types of legs