Developmental Biology of Plants — DU B.Sc. (Prog.) Applied Life Sciences with Agrochemicals and Pest Management pertaining to Botany Previous Year Question Papers

3. Draw labelled diagram wherever necessary. 4. Answer all parts of a question together. (a) Fill in the blanks: 5x1=5 (i) ...meristem is inserted between tissues that are no longer meristematic. (ii) According to the histogen theory, three histogens are................. (iii) The maturation of male and female sex organs at different times is known as.….... (iv) ... ... type of endosperm is found in Acalypha indica. (iv) Protoxylem lies towards the outside and metaxylem face inwards in.... ..xylem bundles. (b) Define the following (any five): 5x1=5 (ii) Self-Sterility (iii) Suspensor (iv) Piliferous layer (iv) Conjoint vascular bundles (c) Find the odd one out (with reasons) from each group of terms: 5x1=5 (i) Integument, Endothecium, Endothelium, funiculus (ii) Tectum, Baculum, Tapetum, Exine (iii) Chlorenchyma, Transfer cells, Aerenchyma, Collenchyma (iv) Vessels, Sieve tube elements, Xylem fibres, Companion cells (V) Phellogen, Intercalary meristem, Lateral meristem, Cork cambium 2. Write short notes on the following (any five): 5×3=15 (b) Tunica corpus theory (c) Meristems on the basis of position (d) Secretory Tapetum Draw neat well labelled diagrams of the following (any three): 3×5=15 (a) T.S. Tetrasporangiate anther showing locules with spore mother cells (b) A mature anatropous ovule (c) T.S. of Dicot stem (e) V.S. of monocot leaf 4. Differentiate between the following (any Three): 3×5=15 (b) Nuclear endosperm and Cellular endosperm (c) Simple tissue and Complex tissue • (d) Dicto root and monocot root (a) Discuss various types of stomata. (7) (b) Describe types and function of endosperm. (8) 6. (a) Discuss post-fertilization development of caruncle, operculum and aril in the seeds. (b) Give an account of structure and function of vascular cambium in secondary growth in plants. (8)