IGNOU BBYCT-133 June 2022 Previous Year Question Paper

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

(0) Autecology

(i) Biome

(iii) Decomposers

(iv) Herbarium

(b) Fill in the blanks with appropriate words : 4x1=4 @ The solid component or the hard surface of earth is called as - Gi) The species kills or harms the prey species for food. Gii) In succulents leaves are reduced to (Gv) Awe is an adequate, appropriate and specific term used to designate an “entity” or a “taxonomic group.”

(c) State whether the following statements are true or false : 82158 @ The plants that live का high temperature throughout the year are called mesotherms.

(ii) Omega taxonomy is also called as beta taxonomy.

(iii) Fidelity refers to the presence of species in high numbers in a community.

Q2.With the help of neat and labelled diagrams, describe any two of the following : 5x2=10

(a) Y-shaped energy flow model

(b) Different zones of soil profile

(c) S-shaped population growth curve

(d) Hydrological cycle

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

(a) Adaptive features in hydrophytes

(b) Major roles of soil biota

(c) Endemism

Q4.Define plant succession. Describe the different stages of succession in a xerosere. 2+8=

(10)

Q5.What do you mean by phylogenetic system of classification ? Give the outline of classification proposed by Engler and Prandtl. Also discuss its merits. 2+6+2=

(10)

Q6.(a) Discuss the “box in box” concept of taxonomical hierarchy. 5

(b) How are the palynological characteristics useful as taxonomic evidence ?

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

(a) Semantides

(b) Characteristics of a good key

(c) Objectives of the Botanical Survey of India

(d) Cladogram

(e) Food Web

(iv) Bafa

(a) fat cart at shad weal A afta : axi=4 AA 3x1=

(3)

Q8.1. 0. 24+6+2=10