IGNOU BBYCT-133 June 2023 Previous Year Question Paper

Q1.(a) Define any three of the following: 3x1=3 @ Biosphere

(ii) Synecology

(iii) Producers

(iv) Alpha taxonomy

(b) Fillin the blanks : 4x1=4 @) Plants growing in shade are called Gi) The soils formed by transportation through wind are called soils. Gii) In Taiga region are the dominant species.

(iv) The system of naming an object of biological origin is called

(c) State whether the following statements are true or false : 3x1=3

(6) Hotspot of biodiversity is a biogeographic region with very low diversity of plants and animals. Gi) An inventory of plants of specific area is called as flora. Gii) A multi-access key contains much more information than a dichotomous key.

Q2.With the help of a neat and labelled diagrams, describe any two of the following : 2x5=10

(a) Stages of succession in hydrosere

(b) Carbon cycle

(c) Components of an ecosystem

(d) Range of tolerance

Q3.Give detailed accounts of any two of the following : 2x5=10

(a) Ecological pyramids

(b) Food chains

(c) Forest ecosystem

Q4.Define insolation. Give a brief description of heat budget of earth. Enlist the factors affecting distribution of insolation. (2+5+8)

Q5.(a) What is binomial nomenclature ? Enlist its major principles. 2+4

(0) What are the major contributions of Bauhin and Linnaeus ?

Q6.(a) Discuss the principles of numerical taxonomy. 5

(b) Discuss the salient features of structure of taxonomic hierarchy.

Q7.Write short notes on any four of the following : 4x2 5=10

(a) Royal Botanical Gardens, Kew

(b) Types of clades

(c) Functions of herbarium

(9) Bracketed key

(e) Phenogram

Q8.1. 0. (@) fet wart at staat weet S ofa : axi=

(4)

Q9.way SA ae Wey Heed Gi) fect fare aa a med at get

Q10.1. 0.