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B.Sc (II Semester) Examination
BOTANY
Paper : BOT–121
( Phanerogams and Palaeobotany )
Full Marks : 50
Pass Marks : 35%
Time : Two Hours
Note : 1. Answer all questions.
2. The figures in the margin indicate fullmarks for the questions.
1. Give brief accounts on any five of the following : 2×5=10
(a) LS orthotropous ovule
(b) Incrustation fossils
(c) Phylloclade
(d) Tubers
(e) Permanent tissue
(f) Autogamy
(g) Triple fusion
(h) Floral part of Gnetum
2. Answer any four of the following : 5×4=20
(a) Describe the fossil Rhynia.
(b) Explain the word ‘cortical bundles’.
(c) Describe different types of ovules in angiosperm.
(d) Write on binomial nomenclature.
(e) Describe at least five types of modified roots.
(f) Write about morphological characters of seed ferns.
(g) What is fossil? What are different types of fossils?
3. Answer any two of the following : 10×2=20
(a) Describe the natural system of classification of plants with example. Enumerate its merits and demerits.
(b) What are mechanical tissues? Write about the principles governing the distribution of mechanical tissues.
(c) Write about the affinities of Gymnosperms with other group of plants.
(d) Discuss in detail the various aspects of self-incompatibility in plants.
(e) Describe the general characters and affinity of Pentoxylon.
(f) Compare the male gametophytes of Pinus and Cycas.
