B.sc Botany 3rd sem. Important questions
1.With the help of suitable labelled diagrams, describe the anatomical features of a dorsiventral leaf. How does it differ from an isobilateral leaf?(15M)
2.Draw well labelled diagrams of the following: (Description not required).(15M)
(i) T.S. of Bougainvillea stem showing anomalous structures (A portion enlarged).
(ii):->A). A mature lenticel (Structure)
B). T.S. Dicot root
C). T.S. of monocot stem
D). T.S of Monocot stem
E). Palisade tissue
F). Heartwood
G). V. T. S. of Dicot leaf.
H). Structure of stomata.
3.Write short notes on any two of following :2 each
(i) Special type of Parenchyma
(ii)Xylem
(iii)Secondary growth in Dicot stem
(iv)Histogen theory
(V)Permanent tissues in plants
(Vi)Difference between (i) dicot root and dicot stem (ii) Annual rings
4.Differentiate any two of the following:
(i) Sieve tubes and companion cells
5.Describe the anatomical features of a typical dicotyledonous stem with the help of well labelled diagram of T.S. of stem and differentiate between the monocot and dicotyledonous stem.
6.Describe the origin of Cambium and its fictions.
7.What is anomalous secondary growth? illustrate your answer with examples.
8.Describe the different types of meristematic tissues found in the stems of Angiosperm.
9.Present a brief account of Tunica-Corpus concept.
10.Write about different elements of Xylem.
11.Describe the formation and activity of cork Cambium.
12.Write briefly about the structure and function of
stomata.
13.Write short notes on the following:
(a) Simple tissue
(b) Vascular cambium
(c) Anatomy of monocotylednous leaf
(d) Annual rings
14.Describe the formation and activity of cork cambium.
15.Describe different types of meristematic tissues.
16. Differentiate between any two of the following:
(a) Heartwood and sapwood
(b) Monocotylednous root and dicotylednous root
(c) Spring wood and Autumn wood.
(d) Permanent tissue and meristement
17.Write a brief note on 'Special types of tissues' .
18.Discuss the structure and functions of epidermis.
19. Write about different theories proposed to explain 'Root Apical Meristem'.
20.What is anomalous secondary growth? Describe the anamolous secondary growth in a dicotyledonous.
21.Present on illustrated account of root-stem transition.
22.What do you mean by secondary growth Describe secondary growth in a dicotylednous root with the help of suitable diagrams.
23. Describe the structure and function of permanent tissues with the help of appropriate diagrams.
24. Write short notes on any five of the following:
1. Stomatal Index
2.Components of Epidermis
3.Special Tissues
4.Components of Xylem Tissue.
5. T. S. of Monocot stem.
7. Mirabilis type of Root Stem Transition.
8. Vascular Cambium
9. Lenticels
25. What are meristematic tissues , Give classification and theories of merissem.
26.What do you mean by Xylem tissues Describe their components with the help of suitable diagrams
27. Draw well labelled diagrams of the following (Description is not required):
(a) T.S. of Dicot leaf
(b) T.S. of Monocot root
28.Describe secondary anomalous Bougainvillea with the help of labelled diagram