IGNOU BBYCT-135 December 2022 Previous Year Question Paper

Q1.(a) State whether the following statements are True or False : 4452

(6) In aleurone layer of grains lipid, proteins and carbohydrates are found. Gi) In monocots lateral meristems are prominent.

(ii) Root hairs are found only in the older parts of root.

(iv) Karyopsis is an example of indehiscent fruit.

(b) Fill in the blanks : 1x3=3

(6) The cells having thick lignified walls Gi) In wheat and maize... constitutes the edible part of the fruit/seed. Qi) is an example of hesperidium type of fruit.

(c) Define the following terms : 1x5=5

(i) Periderm

(ii) Sucker

(ii) Amphivasal vascular bundle

(iv) Cleistogamy

(v) Diplospory

Q2.(a) Define complex tissue. List the various types of complex tissue and describe any one of them. 5

(b) List the special type of roots and describe storage roots with examples and diagrams.

Q3.(a) Describe the structure of stomata with a labelled diagram. 5

(b) Discuss the function of trichome.

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

(0) Discuss self-incompatibility and also describe advantages of cross pollination.

Q5.(a) Describe secondary growth in a typical dicotyledonous stem with 8 labelled diagram. 5

(b) Describe the anomaly in stems due to formation of accessory cambuim and its activity.

Q6.Describe syngamy and triple fusion with labelled diagram. What is the product of triple fusion ? Describe its structure and function.

Q7.Differentiate between any two of the following : 5x2=10 Gi) Dicot and monocot leaf

(ii) Homomorphic and _ heteromorphic self- compatibility

(1) Hydrophily and Zoophily

Q8.Write short notes on any four of the following : 25x4=10 @)_ Lenticels Gi) Insectivorous plants Gii) Polyembryony

(iv) Aril

(v) Mycorrhiza

(vi) Cuticle

(ii) Ware Hat Fast TA 5x2=

(10)