IGNOU BBYCT-133 December 2024 Previous Year Question Paper

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

(ii) Cation exchange capacity

(iii) Limnetic zone

(iv) Biomass

(v) Succession

(vi) Species

(vii) Biometrics

(b) Fill in the blanks spaces with appropriate word(s) in any five of the following statements : 5x1=5 @ The color of longest wavelength of visible spectrum is «0.0... + Gi) The transition layer between epilimnion and hypolimnion is termed AS wee

(iii) The final stage is succession is termed AS veces

(iv) wu... introduced the binomial nomenclature of plants. (Vv) wees taxonomy helps प8 to understand evolutionary and phylogenetic relationship among organisms.

(vi) The Latin word aphylla’ in nomenclature of plant — species indicates wc.

(vii) A primitive ancestral character/ character-state of plant species is called wwe.

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

(a) Components of ecosystem

(b) Energy flow through different components of ecosystem

(c) Biological or taxonomical hierarchy from higher to lower levels

(d) Movement of phosphorus via different components of an ecosystem

Q3.(a) List different types of interspecific and intraspecific interactions in a community and explain their significance. 5

(b) Discuss the human impact on carbon cycle.

Q4.(a) Briefly describe the hot-spots of biodiversity areas in India. 5

(b) Describe the organisational set up in India to explore plant resources.

Q5.Describe in detail the two taxonomic documents that are used to derive information for plant specimen determination.

Q6.(a) Describe the purpose of code in nomenclature of plants. 5

(b) What are the characteristics of an ideal system of classification ?

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

(a) Structure of soil

(b) Plant activities regulated by light (९०0) Sociability in plants

(9) Vriksh Ayurveda

(e) Semantides

(f) Numerical taxonomy ale:

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