M.Sc. (Semester II) (CBCS) Examination Mar/Apr-2018
Botany
BIOLOGY DIVERSITY OF GYMNOSPERMS AND PALAEOBOTANY
Time: 2½ Hours
Max. Marks: 70
Instructions: Attempt total five questions. Figures to the right indicate full marks. Question 1 is compulsory. Answer any two essay questions from Q.2, 3 4. Answer any two short notes questions from Q.5, 6 7.
Q.1
Choose the correct answer from given alternatives:-
14
Atmospheric nitrogen is fixed by through the presence of coralloid roots.
Ephedra
Gnetum
Cycas
Araucaria
The credit of investigating "Thin ground technique" goes to
Nicol
Sanderson
Witham
Harris
Glossopteris flora is the features of
Lower Gondwana
Middle Gondwana

Upper Gondwana
Deccan Intertrappean
Pycnoxylic wood is characterized by the presence of
Small pith and small cortex
Small pith and large cortex
Large pith and large cortex
Large pith and small cortex
Kaloxylon hookeri is genus of Pteridospermales.
Stem
Leaf
Root
fruit
Sporogonites belongs to period.
Cambrian
Devonian
Silurian
Permian
is the stem genus of family palmae.
Palmoxylon
Rhizopalmoxylon
Palmocarpon
Palmocaulon
In Lyginopteris oldhamia primary xylem is type.
Exarch
Endarch
Mesarch
Polyarch
Enigmocarpon is
Monocot fruit
Monocot leaf
O
Dicot root
Dicot fruit
10) In Medullosa thompsoni steles are present.
2
3
23
70
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SLR-UD-117
11) Nilssonia is genus of Cycadales.
Stem
Seed
Leaf
Flower
12) The stem and seed of yield starch known as „Sago‟.
Ginkgo
Araucaria
Cycas
Agathis
13) In Zamia the arrangement of megasporophylls along the central axis is
Axillary
Valvet
Papilaceous
Overlapping
14) In the tracheids are charactererized by tertiary spiral thickenings.
Welwitschia
Ephedra
Cycas
Taxus
Q.2
Explain the diversity of gymnosperms with respect to reproduction.
Describe out line of Indian fossil flora.
07 07
Q.3
Give economic importance of Order Cycadales.
Describe family Osmundaceae.
07 07
Q.4
Reproductive structure of Welwitschia.
Family Rhyniaceae.
07 07
Q.5
Describe:-
Male cone of Ginkgo
Wood of Conifer
Medullosa thompsoni
05 05 04
Q.6
Explain:-
Female cone of Araucaria
Lepidocarpon
Lyginopteris
04 05 05
Q.7
Write notes on any two of the following:-
14
Male cone of Podocarpus
Petrifaction
Coal Maceration