IGNOU BBYCT-133 June 2025 Previous Year Question Paper

Q1.(a) Define any five of the following: 5x1=5 @ Population

(ii) Albedo Gii) Ephermeral annuals

(iv) Decomposers

(v) Phytogeography

(vi) Numerical taxonomy

(vii) Phenetic groups

(b) Fill in the blanks with appropriate word(s) in any five of the following statements : 5x1=5

(i) Out of total water available on earth only uw... percent is fresh water.

(ii) The taxon derived from one ancestral population is called

(ii) ww. are taxa clustered in form of tree on the basis of similarity coefficient.

(iv) The great banyan tree about 250 years old is located in in India.

(v) ‘Flora of Delhi’ is authored

(vi) The total energy accumulated in the _ plant during primary productivity is called 0...

(vii) succession is caused by change in environmental conditions.

Q2.Make neat and well-labelled diagram of any two of the following : 5x2=10

(a) Carbon cycle

(b) Components of an ecosystem

(c) Levels of hierarchy in ecology Various types of ecosystems

Q3.Describe adaptive features in hydrophytes.

Q4.Giving suitable examples, describe how plant communities are recognized.

Q5.(a) Describe the earliest work on plants carried out in scientific manner that formed the basis of botanical teaching and medical studies in ancient India. 5

(b) What are the advantages of scientific names ?

Q6.(a) What are the characteristics of an ideal system of plant classification ? 5

(b) How are taxonomical evidences collected from cytology for plant classification ?

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

(a) Types of soil

(b) Electromagnetic spectrum

(c) Food web

(d) Mangrove forests

(e) Historia Plantarum

(f) Carolus Linnaeus 4x2%=

(10)