IGNOU BBYCT-135 June 2022 Previous Year Question Paper

Q1.(a) State whether the following statements are true or false : 4x 5 =2

(i) Tapetum forms the outermost anther wall layer that surrounds the sporogenous tissue.

(ii) | A monosporic embryo sac is a 7-celled and 8-nucleate structure.

(iii) In dicot roots, pith is large and well-developed.

(iv) Solanum tuberosum is a common example of tuber.

(b) Fill in the blanks : 3x1=3

(i) Cells associated with sieve tube elements are called .

(ii) The root hairs are the outgrowths of cells.

(iii) The pollination that takes place with the help of beetles is called .

(c) Define the following terms : 5x1=5 @ Dermatogen Gi) Stolon Gii) | Ectomycorrhiza

(iv) Integumentary tapetum

(v) | Agamospermy

Q2.(a) List the characteristics of meristematic tissues and describe their properties. 5

(b) List the theories of apical organization of root and describe any one of them.

Q3.(a) Describe runner and stolon with the help of labelled diagrams. 5

(b) Discuss the role of epidermis or rhizodermis in protecting a plant.

Q4.(a) Describe the structure of mature polygonum type of embryo sac with the help of a labelled diagram. 5

(b) Describe cross-pollination and discuss its advantages and disadvantages.

Q5.(a) Describe the structure of the vascular cambium with the help of labelled diagram. 5

(b) Define dendrochronology and describe the formation of annual rings with the help of labelled diagram.

Q6.Define incompatibility. Discuss the factors which are involved in incompatibility. List any five methods which can overcome incompatibility and describe any one of them.

Q7.Differentiate between any two of the following : 2x5=10

(a) Dicot and Monocot root

(b) Wet and Dry stigma

(c) Composite and Ruminate endosperm

Q8.Write short notes on any four of the following : 4x2 डर =10

(a) Phloem structure

(b) Importance of Apomixis

(c) Cladophyll

(d) Cystoliths

(e) Morphological adaptations in xerophytic leaves

(f) Parthenocarpy FMT ARI FART |