Term-End Examination. June, 2012 LIFE SCIENCE

Transcription

1 e--4 No. of Printed Pages : 7 BACHELOR OF SCIENCE (B.Sc.) CY) Term-End Examination CV Cf) June, 2012 LIFE SCIENCE LSE-07 LSE-07 : TAXONOMY AND EVOLUTION Time : 2 Hours Maximum Marks : 50 Note : (i) Question No. 1 is compulsory. (ii) Attempt any four questions from question No. 2 to (a) Match the items given in column A with 4 those given in column B. (b) (i) Column A (i) Origin of species Column B (A) Ouchterlony Lmmunotaxonomy (B) Haeckel (iii) Recapitulation (C) William theory Smith (iv) Stratigraphy (D) Darwin Historia plantarum was written by (ii) Scientific names are given in language. (iii) All vertebrate embryos first develop a type of kidney. LSE-07 1 P.T.O. 3

2 (c) Arrange the following in correct order 3 (ascending or descending) and rewrite. (i) Genus, order, family, phylum, species, kingdom, class. (ii) Tertiary, carboniferous, Silurian, Jurassic, Cambrian, Quaternary, cretaceous. (iii) Australopithecus, afarensis, Homosapiens, H. habilis, H. erectus. 2. (a) Define "fossils" with the help of two examples. State how fossils provide evidence in favour of evolution? 5 (b) What is the significance of the phenomenon 5 of Industrial melanism? 3. (a) How taxonomic characters are selected for 5 classification purpose? Discuss how Whittaker's five kingdom system is able to solve the three main problems associated with two kingdom classification system? (b) What is peripatric speciation? Explain by citing example of Darwin's flinches Indicate whether the following statements are true or false. Give reasons for your choice. 5x2=10 (a) Appendix in man does not support the theory of evolution. LSE-07 2

3 (b) (c) Long and attractive tail in male African widow bird reduces the fitness of the species. Taxonomy is helpful in the study of fossils. (d) Chromosome number is of no use in a key. (e) It is easier to communicate with common names than with scientific names. 5. How would you justify that australopithecines 10 were human ancestors? 6. (a) Discuss the prodigality of nature. Briefly 5 give the factors that limit the reproductive potential. (b) Differentiate between natural, artificial and 5 phylogenetic classification. 7. Write short notes on any two of the following : (a) Herbarium ethics 2x5=10 (b) Archaeoptery (c) Co-evolution of prey-predator. LSE-07 3 P.T.O.

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