LSE-09 Animal Diversity-I in English Solved Assignment 2020

LSE-09 Solved Assignment 2020

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ASSIGNMENT
(Tutor Marked Assignment)
Animal Diversity-I
Course Code: LSE- 09
Assignment Code: LSE-09/TMA/2020
Maximum Marks: 100

Title Name

LSE-09 LIFE SCIENCES Solved Assignment 2020

UniversityIGNOU
Service TypeSolved Assignment (Soft copy/PDF)
CourseBSC (LIFE SCIENCES) LSE
Language ENGLISH and HINDI
Semester2019-2020 Course: BSC (LIFE SCIENCES) LSE
Session2019-20
Short Name LSE-09
Assignment CodeLSE-09/TMA/2020
ProductAssignment of BSC (LIFE SCIENCES) 2019-2020 (IGNOU)
Submission DateThis assignment will remain valid for one year from January 1, 2020 to December 31, 2020

 

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1. (a) What are the salient features of Porifera?
(b) How are coral reefs formed?
(5)
(5)
2. (a) What is torsion? Discuss the process of torsion in gastropods.
(b) What are the characteristics of echinoderms that are unique to
them and not found in other phyla?
(10)
(10)
3. Explain adaptive radiations in Polychaeta. (10)
4. (a) Define biological communication.
(b) What is ritualisation?
(c) What does fixed action pattern mean?
(d) Name any two purpose for which
i) visual signals are used.
ii) auditory signals are used.
(e) What is stridulation?
5. Describe the various types of circulatory system found in non-chordates.
Illustrate your answer with diagrams.
(20)
6. Discuss the non-chordates yielding industrial products and medicinal
products.
(10)
7. Write short notes on the following:
(a) Communication through visual in insects
(b) Chemoreceptors in non-chordates
(c) Water vascular system in starfish
(d) Strobillaiton

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