Code:754300
F.Y. B.Sc
Q.P.
Botany Paper I
Dated:
t7'\L-2016
Model Answer Key for the Examiner
Q.1 (A) Choose correct options (1 mark each)
Answers:-
10M
(a) Asexual reproduction
(b) Scalariform conjugation
(c) Spirogyra
(d) Chlamydomonas
(e)'T'Shaped
(f) Produced by fungal hyphae in basispetal chain
(g) Mycelium
(h) Bryophyte
(i) Two
[)
Protective
Q.1 (B) Answer in one sentence (2 marks
i.
each)
10 M
Flagella: Flagella are small filiform (thread like) protoplasmic appendages found
in motile algae. The main function of flagella is locomotion. The number and
position of flagella are varies in algae.
ii.
pyrenoid: are proteinaceous bodies present in chromatophores. These
organelles are considered to be associated with the synthesis and storage of
starch.
iii.
Ascospore: Ascospore are sexual spore
of
Ascomycetes fungi formed in
ascocarp. Ascospores are released by breakdown
of clistothecial wall. They
germinate when fall on suitable substratum and produce new mycelia.
iv.
Aspergillosis, Aspergillus
rot of appIeOR any other
Aspergillus
v.
Dichotomy in Riccia: Shape of thallus description
disease caused by
Q.2 Answer the following
a) Sexual reproduction in
o
o
.
o
Spirogra
10M
Description of scalariform conjugation (3M)
Diagram of scalariform conjugation(2M)
Description of lateral conjugation (3M)
Diagram of lateral conjugation (2M)
b) Economic importance of algae as biofertilizers and as food
o Algae as biofertilizers Description with examples (5M)
10M
-
o
Algae as food
-
c) Range of thallus in
Description with examples (5M)
Chlorophyta
10M
. Unicellular motile eg. Chlamydomonas(l'5M)
o Unicellular non motile eg. Chlorella (1'5 M)
o Multicellular unbranched filament eg. spirogtra (1.5 M)
o Multicellular branched filament eg' Cladophora(l'5M)
o Foliaceous eg. Uva(|.SM)
o Heterotrichous eg. Chaetophora (1.5l['[)
o Siphonacious eg. CaulerPa(l M)
d) Methods of vegetative and asexual reproduction in Nos/oc
o Vegetative reproduction - Fragmentation (2 M)
. Asexual reproduction - Hormogones, Akinetes, Heterocyst (6 M)
o Diagrams (2 M)
Q.3 Answer the
following
a) Modes of nutrition in
.
o
o
o
10M
fungi
Fungal nutrition - source and mechanism (1M)
Parasitism(3M)
Saprophytism (3M)
Predation(3M)
10M
b) Asexual reproduction and systematic position of
o
o
o
Diagram(z M)
Systematic position with reasons (5M)
in
Aspergillus
10M
Description(antheridium, ascogonium, ascocarp, plasmogamy, karyogamy) (7M)
Diagram(3M)
d) Economic importance of
o
Useful activities
o
Harmful activities
Q.4 Answer the
fungi
10M
following
a) External and internal structure of
o
o
o
o
Ricciathallus
Description of external structure of thallus
Diagram of external structure of thallus
-
Diagram of internal structure of thallus
-
inRiccia
-
10M
(3M)
(ZM)
Description of internal structure of thallus
b) Alternation of generations
o
o
10M
Asexual reproduction description (3M)
c) Sexual Reproduction
o
o
Rhizopus
-
(3M)
(2M)
10M
Description -(6M),
Diagrammatic representation
-
(4M)
c) General characters of Hepaticae(8 to 10 important
points)
10M
d) structure of Riccia sporophyte,spore structure and
o
o
o
o
Diagramof Riccia sporophyte (ZM)
Description and diagram of spore Riccia(2M)
Description and diagram of spore germinationin Riccia(zM)
each)
Vegetative cell of Spirogyra
o
o
ii.
- 4M,
Diagram- 1M
Source
-ZN[
Chemical nature
-
1M
Chemical nature and uses
-ZM
Haustoria
o
o
iv.
v.
Diagram
-
- 4M,
1M
Mushrooms
-
3M
Yeast-2M
AntheridumofRiccia
o
o
vi.
Description
Fungi as food
o
o
Description
Diagram
-
- 4M,
1M
Systematic position of Ricciawith reasons
o
,F
Description
Alginate
o
o
o
iii.
*
10M
Description of structure of mature sporophyte of Riccia(4M)
Q.5 Short notes (any four - SM
i.
germination
Systematic position with reasons-SM
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ZOU