BBYCT-131 · June 2025 · English
IGNOU BBYCT-131 June 2025 Previous Year Question Paper
Biodiversity (Microbes, Algae, Fungi And Archegoniates)
Structured previous year question paper for BBYCT-131, June 2025 session.
Max marks: 50 · Questions: 7
Verified: 29 Jul 2026
B. SC. (GENERAL) (BSCG/BSCM)
Term-End Examination
June, 2025
BBYCT-131 : BIODIVERSITY (MICROBES,
ALGAE, FUNGI AND ARCHAEGONIATES)
Time : 2 Hours Maximum Marks : 50
Note: Question No. 1 is compulsory.
Attempt any four questions from question
nos. 2 to 7.
Q1.(a) State whether the following statements are True or False : 4x1=4
(6) Archaegoniates are classified as embryophytes.
(ii) The transfer of male gametes to female gametes in bryophytes do not need an aquatic medium.
(ii) A scientist who specialises in Bryophytes is called an embryologists.
(iv) Cyanobacteria colonies are associated with the thalli of Pellia.
(b) Choose the correct options from those given in the parenthesis : 4x1=4
(i) (Chlamydomonas/Azolla) is an algae that harbours cyanobacteria. (Gi) When both the gametes in Chlamydomonas are morphologically identical, it is known’ as (anisogamy/isogamy).
(iii) In Staphylococcus, the plane of all types of division is (any plane/at right angles).
(iv) Animalcules was the name given to bacteria by (Louis Pasteur/Anton von Leeuwenhoek).
(c) Match the items given under Column A with those under Column B: Ax%=2 Column A Column B
(a) Lytic cycle
(6). “Rhizobium
(b) Anthrax Gi) Bacteria
(c) Fixes Gii) Rhizoid nitrogen in soil
(d) Attachment
(iv) Bacteriophage organ for bryophytes
Q2.Differentiate between the following pairs of terms : 4x2'%=10 @ Gymnosperms and Angiosperms
(i) Petrifaction and Compression modes of fossilization Gii) Male gametophyte and Female gametophyte of Pinus
(iv) Transduction and Conjugation in bacteria
Q3.(a) “Bacteria have a major impact on human life by their beneficial activities.” Elaborate with examples. 5
(b) Discuss the lysogenic cycle with a neat diagram.
Q4.(a) Enumerate the characteristics of Psilophyta. 5
(b) Describe the habit of a single cell of Chlamydomonas and_ provide a diagrammatic representation.
Q5.(a) Write a short note on Siphonogamous and Zoidogamous plants. 5
(b) “The structure and organisation of Gametophytes in Bryophytes is the most diverse in the plant kingdom.” Elaborate.
Q6.(a) “Sphagnum plays an important role in peat bog formation.” Discuss. 5
(b) Briefly describe the life cycle of Funaria with a diagram.
Q7.Write short notes on any two of the following : 5x2=10
(6) Structure of viruses
(i) Endospores of bacteria Gii) Fungal antibiotics and drugs
(iv) Algae as a source of energy 4x2%=10 5x2=
(10)