B.Sc. (General) 4th Semester
Botany
Paper-B: Structure Development and Reproduction in Flowering Plants—II
Time Allowed: Three Hours] [Maximum Marks: 36
Note: Attempt five questions in all. Question No. 1 is compulsory. Attempt four more questions selecting one from each unit. Draw labelled diagrams wherever necessary.
I. (A) Fill in the blanks :
(i) Pollination by bats is known as__________
(ii) Production and development of seedless fruits without pollination and fertilization is called_____
(iii) Cortical bundles are found in the stem of_______
(iv) Histogen theory was proposed by_________
(v) Phellogen, Phellem and Phelloderm together constitute the protective tissue called________
(vi) A wood is called porus due to the presence of_________in it.
(B) Multiple Choice Questions
(i) The phenomenon where flowers possess some mechanical barrier on their stigmatic surface to avoid self-pollination is:
(a) Dichogamy
(b) Dioecism
(c) Heterostvly
(d) Herkogamy
(ii) Collenchymatous tissue showing deposition of thickening material in the tangential wall of the cells are:
(a) Lamellar
(b) Angular
(c) Lacunate
(d) None of these
(iii) Central Portion of nonfunctional xylem is:
(a) Sapwood
(b) Alburnum
(c) Heartwood
(d) None of these
(iv) Special type of fleshy buds in aquatic plants for the vegetative propagation are :
(a) Bulbils
(b) Turions
(c) Offsets
(d) Stolons.
(v) The condition where plants never open to ensure complete self-pollination is :
(a) Homogamy
(b) Cleistogamy
(c) Geitonogamy
(d) Xenogamy
(vi) The vascular bundle in which the phloem is surrounded by xylem is :
(a) Radial
(b) Conjoint
(c) Amphivasal
(d) Amphicribal.
UNIT—I
II. Give a brief account of components of Xylem in the vascular plants giving their chief functions.
III. With the help of suitable diagrams, differentiate between dicot stem and monocot stem.
UNIT—II
IV. Give an illustrated account of anomalous structure in the stem of Mirabilis.
V. Explain briefly about Micropropagation.
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