IGNOU BBYCT-133 December 2022 Previous Year Question Paper

Q1.Define any five of the following : 5x2=10

(a) Paleoecology

(b) — Ecotone

(c) | Hydrosphere

(d) Heterotrophs

(e) Mutualism

(f) | Cation exchange capacity

(g) | Physiognomy

(h) Trophic levels

Q2.Make neat and well-labelled diagrams of any two of the following : 2x5=10

(a) Flow of nitrogen through the environment

(b) | Herbage cover and basal area

(c) | Stages of succession on a bare rock

(d) Different types of precipitation

Q3.With the help of well-labelled diagrams, write a detailed account on any one of the following : 10

(a) Soil profile

(b) Food web in a grassland

Q4.(a) List the objectives of plant taxonomy. Describe plant taxonomy in ancient India. 5

(b) Describe the construction and use of a taxonomic key. List types of keys and discuss the faults and limitations of each.

Q5.(a) Discuss how evidence from Phytochemistry can help in solving problem of plant taxonomy by citing an example. 5

(b) Explain the concept of taxonomic hierarchy and arrange various categories from highest to lowest.

Q6.(a) List types of classification and discuss any one of them along with its merits and demerits. 5

(b) Explain species concept.

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

(a) Royal Botanic Gardens, Kew

(b) Monograph or Manual

(c) | Edge-punched card

(d) Scientific names and their advantages

(e) OTU (Operational Taxonomic Unit)