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Posted Date: 02 Jun 2021 Posted By:: Shubham Jain Member Level: Silver Points: 3 (₹ 2)
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2020 Indira Gandhi National Open University General B.Sc Life science IGNOU TEE 2020 June Lse - 09 (Animal Diversity - 1) question paper Question paper
Are you in the BSc course of Ignou and looking for previous year question papers? Here is the question paper of Lse - 09 (Animal Diversity 1) of June 2020 session. Feel free to download it as it is 100% free and stay tuned for more such.
Q1. (a) Differentiate between any three of the following pairs: [6 marks] (i) Acellular and Cellular organisms (ii) Biting-chewing and Sucking types of mouth parts (iii) Open and Closed types of circulatory system (iv) Taxis and Kinesis. (b) Match the following: (c) Choose the appropriate 'option given in the parentheses. [4 marks] (i) (Robert Hooke/Schleiden) discovered 'cells' in 1665. (ii) (Atolls/Barrier) reefs consist of a ring-shaped reef enclosing an open lagoon. (iii) Sacculina belongs to the order (Rhizocephalan/Decapodal) (iv) The typical gastropod shell is (symmetrical/asymmetrical). Q2 (a) Differentiate between prokaryotes and eukaryotes. [7 marks] (b) Discuss the origin and evolution of metazoan. [8 marks] Q3. (a) Describe the characteristic features of different classes of animals belonging to Phylum Porifera. [7 marks] (b) What are coral reefs? Explain types and formation of coral reefs. Q4. (a) Describe the process of torsion in gastropods. [7 marks] (b) What are the characteristics of cephalopods that are unique to them and make them distinct from other animals? [8 marks] Q5. (a) Explain coelom and metamerism in annelids. [8 marks] (b) Describe the chief variants of mechanoreceptors of non-chordates and explain as to how they function. Q6 (a) Explain the concept of neurosecretion and describe neurosecretory system in non-chordates. [8 marks] (b) Only with the help of labelled diagrams describe the male and female reproductive organs of scorpion. (No description is required.) 7. Write short notes on any three of the following: [15 marks] (a) Visual signals in nonchordates (b) Blood fluke and its life cycle (c) Prevention and control of Arthropod pests. (d) Formation of Pearl.
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