1. No category

BACHELOR OF SCIENCE (B.Sc.)
Term-End Examination
June, 20o,6
L IF ES C IE N C E
L S E -1 : C E L LB IOL OGY
Time : 2 hours
Note :
Maximum Marks 50
Answer the questionsas directed under SectionsA,
B and C. Draw neot and labelleddiagramswhereuer
necessqrv.
SECTION A
Answer all questions.
Al. Fill in the bfanks:
(i)
The cell organellethat replenishesthe oxygen in the
atmosphericair is _
(ii)
7x5:5
.
The cytoskeletalsystem of a eukaryotic cell is made
'
of mesh of fibres, such as
and
microfilamentsthat criss-crossthrough cytoplasm.
LSE-1
P.T.O.
(ii1 tn meiosis ttie "chromosorriesare duplicated during
(iv)
The pumping and channelling of molecules across
plasma membrane is carried out by transmembrane
(v)
Increased concentration of Ca2* in the smooth
activitY.
musclesstimulates
A2. Choose the correct answer in the following from the
7x3
options given for each :
(i)
A molecule of ATP i. ,t*.t,rrutty O-,fu, a
(a) RNA nucleotide
(ii)
LSE-1
(b)
DNA nucleotide
(c)
amino acid
(d)
fatty acid
Which one of the following substances moves
regularly from nucleusto the cytoplasm?
(a)
Glycogen
(b)
DNA
(c)
RNA
(d)
Cholesterol
(iiil
Lignin is a component of the 9e99ndqrycell walls of
(a) Epidermis
(b)
Sclerenchyma
(c)
Parenchyma
(d)
Collenchyma
A3. Choose the correct answer from the alternativesgiven in
7x2
.parentheses,
(i)
The enzymes which catalyse the same chemical
reaction but have distinct chemical properties are
called (isoenzymes,/holoenzymes).
(ii)
The
LSE-1
enzlme (helicase,/topoisomerase) disrupts
hydrogen bonds between base pairs and thereby
createssingle strandedregions.
P.T.O.
SECTK)N B
Attempt any tour questions.Each question carries tiue
morks.
Bl. Compare the advantages of scanning and transmission
electronmicroscopesover light microscope.
82. Describedifferent stagesin the evolution of eukaryotes.
5
83. Explain the formation of the following tissues in animal
development :
84.
(i)
Epithelium
(ii)
Nerve ganglion
zj+z|
Schematically outline the relationship between the catabolic
and anabolic pathways. (No description is required)
5
85. Explain genetic control of enzyme activity in bacteria as
proposedby Jacoband Monod.
86. Describe Ihe events that occur before a cell can enter
mitosis.
87. Describe the operation of proton pump in oxidative
phosphorylation.
LSE-1
5
SECTION C
Attempt any two questions.Each question carries ten
marks.
Cl. (i)
(ii)
List the categoriesof enzymesoperatingin a cell.
Why is it necessarythat the enzymeactivity must be
regulated?
(iii) List variousmodes of their regulationand explain any
one in detail.
C2. (1)
(ii)
Ca. (i)
(ii)
C4. (i)
(ii)
LSE-1
3+2+5
With the help of a suitable diagram describe the
structureof nucleus.
Give an illustrated account of the various levels of
organisationfrom DNA to chromosomein a cell.
5+5
List the varioustypes of tissuespresent in plants and
animals.
Describethe conductingtissuesof plants.
5+5
List the different criteria for the separation of
macromolecules
from a mixed population.
Describeone techniqueeach basedon any two of the
above criteria.
4+6
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LSE-1
11
5,000
BACHELOR OF SCIENCE (B.Sc.)
Term-End Examination
June. 2006
LIFE SCIENCE
LSE-2 : ECOLOGY
Time : 2 hours
Note :
Maximum Mqrks : 50
sections qre compulsory. Supplement your
onsuerswith neat ond labelleddiaqrqms.whereuer
necessary.
All
SECTION A
Note:
AII questionso/ fhis section are compulsory.
Al. State whether the given statementsare true or t'olse'
)"6:3
(i)
Aerosols are distributed uniformly throughout the
atmosphere.
(iD
Movement of water in plants from roots to leavesis
known as transpiration.
(iii) Ecosystemsare self-sustainingbecausethey are well
insulatedfrom outsideinfluences.
LSE-2
P.T.O.
terrestrial ecosystems, the temperature
changesin aquatic ecosystemsare not very sharp.
(iv) Unlike
(v)
A biotic communi$ is an assemblageof interacting
(vi) tt*t:::ession
takes much longer than secondary
successionbecauseit involvesdevelopmentof the soil.
A2. Give the technical term for each of the following :
7x2:2
integration between ecological
(i)
The zone of
communities.
(ii)
Functional role of a species in the communit5r
including all its activitiesand relationships.
A3. Fill in the blanks
!x4=2
(i)
The density of population decreaseswith increasein
and emigration.
(iil
The physico-chemically active fraction of soil is
(iii) Within the ecosystem, energy is transferred from
organism to organism in the form of
energy.
(iv) Water helps animals maintain their normal internal
LSE.2
A4. Define the following :
(i)
Carrying capacity
(it)
Biomagnification
1x3:3
(iii) Keystone species
LSE.2
P.T.O.
SECTIONB
Nofe:
0
AttemPt anY four questions'
(ii)
All questionscarry equal marks'
Bl. Discussthe role of solar energyin water cycle'
minimize
82. Describe any five adaptationsof xerophytesthat
7x5=5
the loss of water through transpiration'
in forest
83. What is social forestry ? Discuss its role
7+4:5
conservation.
84. Define the term biota and describethe biota of estuaries'
7+4=5
to the
85. Discuss any five adaptations in primates that led
7x5:5
evolution of first human species'
the
86. What is meant by demographictransition ? Compare
birth and death rates, before, during and after demographic
2+3:5
transition.
87. Describefive causesof degradationof ecosystems'
LSE-2
1x5=5
SECTION C
Note z
(i)
Attempt ony two questions.
(ii)
AII questionscarry equal marks.
Cf . (il
(ii)
Describethe various componentsof an ecosystem'
Differentiate between a natural and an artificial
6+4:70
ecosystem.
C2. Describethe causesand consequencesof water pollution'
5+5:70
C3. With the help of a labelled diagram, describethe carbon
5+5=70
cycle.
C4. Describethe various stagesof successionin a pond'
LSE-2
70
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LSE-2
l1
4,000
I
I
BACHELOR OF SCIENCE (B.Sc.)
Term-End Examination
June, 2006
LIFE SCIENCE
LSE-3 : GENETICS
Time : 2 hours
Maximum Marks : 50
Note:
(i)
Section A : Answer all the questions.
(il
'
(iii)
SectionB : Answer any four questions.Limit your
answer to 200 words each.
Section C : Answerany two questions.Limit your
answer to 350 words each.
SECTION A
Al. Fill in the blanks:
7x2=2
kinds of gametes.
(ii)
LSE-3
A
test
cross distinguishes between dominant
and helerorygousindividuals.
P.T.O.
A2. Choose the correct answer among those given in
1'x2=2
parenthesis:
(i)
gene
a
when
Pleiotropy
occurs
(reversible,/muttiple)
effectson phenotype.
has
(ir)
(Amniocentesis/Autoradiography)is the technique
used for prenatal detection of chromosomal
abnormalitiesof the foetus.
A3. What would bi the phenotypic sex oI Melandrium plants
having following chromosomalcompositions?
!x4=2
(i)
2A + XX
(ii)
4A + XXXY
(iii)
2A + XXY
(M
3A + XXX
A4. Match the items given in Column I with those in
1
Ll4=2
ColumnII :
ColumnII
ColumnI
(a)
ABCD ,.
EFG
(1) Duplication
v
A
DFG
(b)
Bar eye in Drosophila (2) Down Syndrome
(c)
(3) Intrachromosomal
Chromosomewith
Translocation
identical arms (p and d
(d)
Trisomy 21
LSE-3
(4) Isochromosome
2
A5. Write T for true and F for false statements:
-
7x2:2
(i)
The mitochondrial DNA of yeast is equal in size to
that of human beings.
(ii)
Bottle-neck,eiiect on gene frequenciesoccurs when
the population is drasticallyreduced in size in one
generation.
LSE-3
P.T.O.
SECTION B
Bf . (a)
(b)
B.2. (a)
Compare the sex determination mechanism in
humans with that in the birds.
2I
Discussany two Xlinked traits in humans.
2'
What are histones and how do they aid in DNA
packaging?
(b)
Draw labelled diagrams of the major morphological
types of chromosomes.
83. (a)
Name four categoriesof chemicalmutagensand give
the mechanismof mutagenesisby any one of these.
2+
Briefly explain the regulationof trp Operon.
2i
Discussthe result of non-disjunctionof homologous
chromosomesduring meiosis.
2i
Mention the important modesof cancertreatment and
write one limitation of each.
2i
Differentiate between the cell mediated and antibody
mediated immunity.
2+
Two allelesC and c have their frequenciesas 0'7 and
0'3. What are the frequencies of the possible
genotypesthat these allelescould form ?
2+
(b)
84. (a)
(b)
85. (a)
(b)
LSE-3
4
86. (a)
(b)
LSE-3
Explain the processof cataboliterepression.
2i
What will be the outcomeof completeand incomplete
penetranceoI a gene ?
2t
P.T.O.
sEcTtoNc
Cl. Give a brief account of structureof B-DNA and compare it
with that of Z-DNA.
10
C2. Discusswith examples,any two ways by which plants can
be improved using genetic engineeringtechniques.
10
C3. Differentiate between identicaland fraternal twins. Explain
how twin studies are helpful in understanding the
inheritance of traits in humans.
10
C4. Describelhe role of autopolyploidyand allopolyploidyin the
evolution of plants.
70
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LSE-3
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P.T.O.
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12
10
70
4,000
BACHELOR OF SCIENCE
Term-End Examination
June, 2006
LIFE SCIENCE
LSE-5 : PHYSIOLOGY
Maximum Marks: 50
Time : 2 hours
Note :
Use separateanswer sheetst'or Part I and Part II.
Be brief ond precise in your onsuers.Draw neat
and labelled diagrams,whereuer necessary.
PART I
(Animal Physiology)
Note :
SECTION A
Attempt all questions.
A1. Select the correct word {rom the alternativesprovided in
the parentheses:
|xZ:l
(i)
The volume of blood qected from the heart per unit
time is called (cardiacoutput/stroke volume).
(ii)
The principal source of estrogen and progesterone
during the later half of pregnancyis (follicle/placenta).
LSE-s
1
P.T.O.
A2. Fill in the blanks,
.
Lln:,
(i)
The leaping of action potential between the nodes of
Ranvier is known as _
conduction.
(iD
Chylomicrons are collected by
intestinal villi.
in the
(iii) Splitting of arginine into urea and ornithine is
catalysedby the enzyme
(iv) Myoglobin is found in
vertebrates.
muscles of
A3. Match the items given in Column A with those given in
Column B.
|x+=z
Columh A
Column B
(i)
Gastrin
(a) Fats
(ii)
Trypsin
(b) Polysaccharides
(iii) Lipase
(c) Proteins
(M
(d) Gastrointestinal
hormone
LSE-5
Amylase
SECTION B
Note :
Attempt all questions.
81. Describethe mechanismof musclecontractionas proposed
by Huxley and Hanson.
OR
Describethe transmissionof information from one neuron
to another neuron at sYnaPSe.
82. Write short notes on any two of the following t
tllt:U
(i)
Excitation of mammalian heart
(ii)
Non-shiveringthermogenesis
(iiil
Digestion and absorption of lipids
(iv)
Role of ecdysone and juvenile hormone in moulting of
insects
83. Explain how glomerular filtrate is produced and why it has
4+7:5
a low protein concentration.
OR
(i)
Explain the tracheal mode of respiration in insects'
(ii)
How does countercurrentflow of blood and water in
the gills of fish help in better oxygen absorption ?
ZL
LSE-5
2i
P.T.O.
84. Give a schematicdiagram of the steps of spermatogenesis
in mammals. State the origin and functions of male
reproductivehormones.
z)+z!=s
OR
How do marine animals maintain the osmotic balance in
their body ? Explain with the help of suitableexamples.
3+2=5
LSE-5
4
PART II
(Plant Physiology)
SECTION A
Note:
Attempt aII questions.
Al . In the following statementschoose the correct alternatives
given in parentheses,
|x2:1
(i)
The element present in the enzyme nitrogenaseand
nitrate reductaseis (Mo,/Cu).
(ir)
Phloem sap is rich in (sugars/nucleicacid)
word ,
A2. Fill in the blank spaceswith the appropriate
'
(i)
'!x2=1
2"-
PEP carboxylasehas higher affinity for CO, than
carboxvlase.
(iil
The movement of water through lMng cells is called
_ pathway.
A3. Choosethe correctanswerfrom the following t
(i)
|x2:1
Cytokinins
(a) delay senescence
(b) promote fruit ripening
(c)
LSE-5
promote abscission
P.T.O.
(ii)
Nif genes are required
(a)
for functional nitrogenase
(b)
for the formation of nodulesin roots
(c)
for the maintenanceof N, fixation
A4. State whether the following statementsare true or false ,
*t=t
(i)
The key element that performs osmotic function in
plants is potassium.
(ii)
Ca2* is a part of chlorophyll.
A5. Define photoperiodism.
LSE-5
6
SECTION B
Note :
Attempt aII questions.
81. What is a heterocyst? What is its role in N, fixation ? How
does it help in the functioningof nitrogenaseenzyme?
4
82. What are the criteria of essentialitvof mineral elements?
4
OR
DiscussPressureFlow Model of Mtinch for the mechanism
of phloem transport.
83. Distinguishbetween
'
.
(i)
C3 and C4 plants
(ii)
PS I and PS II
84. Write short notes on any furo of the following :
(i)
Vernalization
(ii)
Haploid plants
2x2=4
2x2:4
(iii) Osmoticstress
85. Discuss the role of plant hormones in agriculture and
horticulture.
LSE-5
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LSE-5
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LSE-5
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LSE-5
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LSE-5
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LSE-5
15
4,000
a
a
BACHELOR OF SCTENCE (B.Sc.)
Term-End Examination
June, ?OOG
L IF ES C IE N C E
LSE-6 : DEVELOPMENTAL
B|OLOGY
Time : 2 hours
Note :
MaximumMarks: 50
Answer Part I and part II in separateanswercopies.
Answer the questionsqs per instructions in esch
section. Draw
necessary.
labelled
diagrams, whereuer
PART I
PI.^ANTS
SECTION A
Note :
Answer all questions.
Fill in the blanks.
Al.
A true fruit developsfrom the
42. The age of a tree can be determined by studying its
7
LSE-6
P.T.O.
A3- An outgrowth near the micropyle that guides Pollen tube
entry into ovule is called
A4. In Mangifera indico several embryos originate from
cells.
A5. In angiospermsthe female gametophyteis representedby
LSE-6
SECTION B
Note :
Answer anY fout questions-
81. List various anther wall layers and describethe function(s)
1+4=5
performedby each of these.
82. Describe any two adaptations in bisexual flowers for
Z|+Z)=S
preventingself-pollination.
? Discussthe role of plant hormones
83. What is organogenesis
1+4:5
in this process.
84. Write short notes on any two oI the following :
(il
Quality of wood
(ii)
GeotroPism
2jx2:5
(iii) Somaticembryogenesis
85. Make labelleddiagramsof any tuo of the following : Z|"Z=S
(il
Median longitudinal section of mature embryo of
Triticum.
(ii)
L.S. of shoot apex showingtunica and corpus'
(iiil T.S. of modifiedroot of sweetpotato'
86. Describevariousseed appendages'How do these help in
2t+Z|=S
elfectivedispersalof seed ?
LSE-6
P.T.O.
PART IT
AMMAIS
SECTION A
Note :
Answerall questions.
41. Fill in the blanks:
|"a:s
(i)
The type of growth in which different parts of the
body grow at different rates is known as
growth.
(ii)
In birds, the type of blastula produced is known as
(iii) The regular replacementof RBCs in our body is an
example of -._-.--regeneration.
(iv) hormone is responsibleior the retention of
larval charactersin insectsand ecdysonepromotes the
process.
(v)
The movement of cells influenced by the physical
surface,over which they pass is termed as _
(vi) Determination of limb type and species specificity
reside in the germ layer called
LSE-6
4
A2. Diflerentiate between any two of the following :
(i)
Morula and Blastula
(iil
Invaginationand Evagination
(iiil
Spermatogenesisand Spermiogenesis
LSE-6
7x2:2
P.T.O.
SECTION B
Note :
Answer any four
questions.
Bl. Write short notes on any two of the following :
(a)
Secondaryinduction
(b)
Neurulationin Chick
(c)
Neoteny
2|x2=s
82. Explain any two embolic types of morphogenetic
movementsduring gastrulationand draw their diagrammatic
representations.
s
83. Explain the origin and migration of primordial germ cells
(PGC) in frog with suitablediagrams.
s
84. List any five similaritiesin the metamorphic-process
of
amphibiansand insects.
s
85. Discussthe role of Iree radicalsin the processof aging.
s
86. Briefly describe any tutoof the following :
(i)
Tumour suppressorgenes
(ii)
Implantation of the human embryo
(iii) Regenerationin Hydra
LSE-6
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LSE-6
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LSE-6
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LSE-6
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LSE-6
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LSE-6
12
4,000
;
BACHELOR OF SCIENCE (B.Sc.)
Term-End Examination
June, 2006
L IF ES C IE N C E
LSE-7 : TAXONOMY AND EVOLUTION
Maximum Marks: 50
Time: 2 hours
Note :
This question pqper consisfsof three SectionsA,
B and C. Answer the questionsas directed under
each section. Draw neot and lobelled diagrams
whereuer necessarv.
SECTIONA
,
Note :
Answerall the questions.
Al. Fill in the blanks:
7x2=2
(i)
All vertebrate embryos first develop a type of kidney.
(iil
Mutations resulting from the addition or deletion of
mutations.
base pairs are called
LSE-7
P.T.O.
42. Write True for correct and Folse for incorrect statemenrs:
7x2:2
(i)
Darwin and Wallacewere the co-authorsof the book
"Origin of Species".
(ii)
Various geographicalregions have their own typical
flora and fauna.
A3. Choose the correct alternative from the options given in
parentheses:
7x2:2
.
(i)
Speciation which refers to speciation in populations
separated by
space is
called (Sympatric
speciation,/Allopatricspeciation).
(ii)
The keys based on the phylogenetic relationship
betweenvarioustaxa are (Naturalkeys,/Artificialkeys).
A4. Which tuso of the following pairs are correctly matched ?
7x21,
(i)
Selection coefficient
measureof selection
pressure
(ir)
Normalising selection
maintainsg"r,"ii.
homeostasis
(iii) Adaptive value
selection acting in a
heterogenous
environment
A5. Define the following :
(i)
Fossit
(ii)
Gene pool
LSE-7
7x2:2
2
SECTION B
Note :
Answer any four quesfions.Limit your answer to
750 wordst'or each question.
81. "Systematicbotany is an unending synthesis."Elaborate
this statement in terms of "Anatomv in relation to
Taxonomy".
B,2. Define homologousorgansand give any two examplesfrom
chordates.
7+4:5
[l3. What do you understandby genetic recombination?
5
[l4. Briefly comment on the possiblehominid phylogeny.
5
[l5. Explain co-evolutionof prey - predatorsrelationship.
5
86. How do DNA hybridisation studies help in determining
closenessor distantnessof two species?
LSE-7
P.T.O.
SECTION C
Note :
'
Answer any two questions. Limit your answersto
300 words t'or each question.
Cl. Write in detail the significanceof Darwin's contributionwith
respectto organicevolution.
10
C2. What are the different pre-mating isolating mechanisms?
2+8=70
Discussany one of them giving examples.
C3. l'Tool-making and languageskills have played a significant
10
role in human evolution."Discuss.
LSE-7
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LSE-7
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LSE-7
P.T.O.
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LSE-7
3,000
BACHELOR OF SCIENCE (B.Sc.)
Term-End Examination
June, 2006
LIFE SCIENCE
LSE-9 : ANIMAL DIVERS|TY-I
Time : 3 hours
Note :
Maximum Marks : 75
This questionpaper comprisesthree sectionsA, B
snd C. Answer the questionsas directed under each
section.
SECTION A
Note :
-
Answer all questions.
41. Choose the correct alternative from -those given in
parentheses.
Ix3:3
(i)
Viruses are (cellular/acellular).
(ii)
In prokaryotes,Mitochondria are (presentlabsent).
(iii) Flagellated cells of canal system of sponges are
(pinacocytes/choanocytes).
LSE.9
P.T.O.
7x5=5
A2. Fill in the blanks |
(i)
The Cell Theory was formulated by
(ii)
Trypanosoma gambiensecauses
disease'
(iii) Class Calcarea is characterizedby the presence of
'
spiculesmade uP of (M
Excretion in Phylum Platyhelminthesis by
cells.
(v)
The two fused segmentsin millipedes are known as
A3. Name the following :
(i)
Feeding on large mass of food'
(ii)
Responseto stimuli by complex adaptive activity'
7x4:4
(iii) Class of Phylum Annelida which includesLeech'
(iv) The general category of 'chemicals secreted by
endocrine glands.
(T) or
- statementsare true
A4. State whether the following
)"A:S
fatse(F):
(i)
Gastrea was the hypothetical metazoan proposed by
Haeckel.
(ii)
Five Kingdom classification was proposed by
Whittaker.
(iii) Crystallinesryleof bivalvessecretesdigestiveenzymes'
LSE-9
(iv) ClassArachnidaare regardedas living fossils.
(v)
Tube
feet are
Echinodermata.
the
locomotory
organs
ol
(vi) Lung flukes are found in India.
LSE-9
P.T.O.
SECTION B
Note :
Answer ony six questions.
81. Give the Five Kingdom classificationand assign the
following to their respectivekingdoms :
Yeast, Sponge, Moss, Blue green algae, Tapeworm,
Mushroom,Frog.
82. Name any five parasitic protozoans, and the diseases
causedby them.
83. Draw a labelleddiagram of the male reproductivesystemof
Cockroach.
84. List any five differences in the life-history stages of
Anophelineand Culicinemosquitoes.
85. Give any three advantagesand any two disadvantagesof
social organizationin insects.
86.
Give
one
reason why
asexual reproduction
is. more
prevalent in lower animal phyla. Write any four ways how
asexual reproduction is advantageous to the animals.
1+4:5
87. Give the classificationof Phylum Platyhelmintheswith one
representativeof each Class. Explain very briefly the type
of nervoussystemin Platyhelminthes.
88. What is coelom ? Give an account of the two types of
coelom.
LSE-9
SECTION C
Note :
-
Attempt any three quesfions.
Cl. List the three theories about the origin and evolution of
3+7:70
Metazoa.Describebriefly any two of these.
C2. Discussthe three common types of coral reefs. How are
patch reefs different from the others ?
9+1=70
C3. Give a detailedaccountof the adaptiveradiation pertaining
10
to respiration in Arthropoda.
C4. Discussmetamerismin non-chordates.
70
C5. Name the two kinds of molluscsthat produce pearls.
Describewith the help of diagramshow a pearlis produced. 10
LSE-9
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LSE-9
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LSE-9
P.T.O.
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LSE-9
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LSE-9
11
3,000
t
t
BACHELOR OF SCIENCE (B-Sc.)
Term-End Examination
June, 2006
LIFE SCIENCE
L S E - 1 0 : A N I M A L D I V E R S I T Y- l l
Maximum Marks : 75
T i m e: 3 h o u r s
Note :
The questionpaper consistsot' three sectionsA, B
and C. Answer the questionsas directed in each
section.Whereuerneeded,supportyour answerwith
diaqrams.
SECTION A
Answer all the questions'
-
Note :
.
Al. Fill in the blanks :
(i)
7x5=5
Protostomes are the animals in which mouth arises
from the
(ii)
Dipnoi include the three surviving genera today,
namely Lepidosiren, Neoceratodusand
I
tI I
LSE-10
P.T.O.
(iii) Alligators and Gharialsbelong to the Order _
.
(iv) Monotremata are the most primitive members of
(v)
Scales of teleost fishes are of two types, namely,
cycloid and --
.
42. Write True (T) for correct statementsand Folse (F) for
incorrect statements.
lxS:S
(i)
Reptilesfeedby filter feedingmechanism.
(ii)
External respiration is the utilization of oxygen for
oxidation of nutrients in cells and tissues.
(iii) Amniotes have double blood circulation pattern in
which blood passestwice through the heart.
(iv) Protonephridia, the organs of excretion in
Branchiostoma,are ectodermalin origin.
(v)
Central nervous system consistsof brain, spinal cord
and cranial nerves.
A3. Matchthe itemsgivenin ColumnI with thoseof Column II.
1,x5=5
Column I
Column II
(i)
Skull
(a)
(ii)
Gonadal hormone
(b) Craniata
(iii)
Animal behaviour
(c) Animalsocieties
Relaxin
(iv) Altruism
(d) Ethology
(v)
(e) Yellow colour
LSE-1O
Pteridines
2
-t
SECTION B
T
Note :
Answer any six questions.
B1. (a)
List any five points of difference between
chordates
and invertebrates.
(b)
Draw a schematicdiagram showing
four distinctive
characters of chordata.
;
B.2. (a)
(b)
zlxz=s
List any five characteristics
of birds.
Mention five types of featuresfound in
modern birds.
zlx2:s
83. (a)
(b)
84. (a)
Name the four successivelayers present
in the
integumentof mammals.
Explain the process of Keratinizationin
terrestrial
vertebrates.
What are gills ?
(b)
Mention their two types.
(c)
Explainthe ways in which a giil runctions.
85. Draw the labelleddiagramsof the
following :
(a)
Somaticsensoryneuron
(b)
Somaticmotor neuron
LsE-10
l+iis=s
2)xZ:s
P.T.O.
86. (a)
(b)
87. (a)
(b)
n8. (a)
on the basis
List the five types of vertebraeclassified
of the centrum'
Draw a labelleddiagram of a typical vertebra "t
"Lr=U
zZ^z
Explainthe term "Animal behaviour"'
?
Why is it important to study animal behaviour
2+3=5
in animals ?
Wfrat is meant by social organization
Discussthe benefitsand costsof sociality'
2+3-5
following :
89. Write short notes on any tuto of the
Zlx2=5
(b)
(a)
SubclassElasmobranchii
(b)
Digestivesystemof amphibians
(c)
LSE-1O
parts through
Structureof vertebrateeye and labelthe
which light rays pass into the retina
(No descriPtionis needed)
4
SECTION C
.
Note :
Answer any three questions.
Cl. Discussthe ancestoryand evolutionof birds.
^'
10
e2. Compare the venous system of amphibians with that of
reptiles.
10
C3. With the help of suitablediagrams,describethe location,
structureand function of pituitary gland in humans.
i6
C4. Write an essay on the importance of colouration in
vertebrates.
70
C5. How have mammals successfullyadapted to their life on
land ?
10
LSE-1O
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L S E - 1O
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8
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LSE-IO
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L S E . 1O
11
r lo
+
10
3,000
t
a
BACHELOR OF SCIENCE (B.Sc.)
Term-End Examination
June, 200,6
LIFE SCIENCE
LSE-12 : PLANT DIVERSITY-I
Maximum Mqrks : 75
Time : 3 hours
Note :
Answer the questionsas directe) in SectionA, B
and C. Drqw neat qnd labelleddiaqramswhereuer
necessarv.
SECTIONA
Note :
AII the questionsin this sectionare compulsory.
Al. Fill in the blanks,
7x5:5
(i)
A colony of Voluox with cells arranged in a specific
manner is called a
(ii)
The male and female sexual reproductive bodies in
Ascomycetesare called antheridia and respectively.
L S E - 12
P.T.O.
(iii)
plays an essential role in bringing
about fertilizationin Bryophytes.
(iv) In Pteridophyteswhen the phloem is on both external
and internal surfacesof xylem, this type of stele is
called
(v)
The Five-Kingdom
classification was proposed by
A2. Indicate which of the following statementsare true or
7x5:5
false :
(i)
Cyanophyta are prokaryotes.
(ii)
Chlamydosporesare perennatingspores.
(iii) Red snow is causedby red algae.
(iv) The elatersare formed from sporogenouscells.
(v)
The genus Equisetum is commonly known as
horsetails.
A3. In the following statements,choose the correct alternative
word given in parentheses.
1x5:5
(il
The
life
cycle
I)lua
shows
of
(isomorphic/heteromorphic)alternationof generations.
(ii)
Viruses infect other organisms and reproduce
themselves(outside/inside)
the host cells.
(iii) Fungi are (achlorophyllous/chlorophyllous)
organisms.
LSE-12
In Pellia the antheridia are present on the
(dorsal/ventral)surface of the thallus in antheridial
cavities.
ln Psilotum each fructificationrepresentsa group of
(two/three) fused sporangiacalledsynangium.
L S E - 12
P.T.O.
SECTTON B
Note :
Answerony six questions.All questionscarry equal
marks.
Bl. With the help of a well-labelleddiagram describebriefly the
ultrastructureof a cvanobacterialcell.
5
82. Describesexualreproductionin Neurosporc.
5
[}3. Write briefly the economicimportanceof lichens.
5
84. Draw neat and labelled diagrams of any two of the
following '
Z1*Z=S
(i)
Vegetativestructureof Ulothrix
(ii)
L.S. capsuleol Funaria
(iii) V.S. leaf of wheat passingthrough uredosorus
(iv) L.S. strobilusoI Selaginella
85. Match the following given in Column A with those given in
1x5:5
Column B :
ColumnB
Column A
(a)
Late blight of potato
(i)
(b)
Ectocorpus
(ii) Cyanobacteria
(c)
Yellow-greenalgae
(iii) Pucciniatritici
(d)
Black rust
(iv) Phaeophyta
(e)
Phycocyanin
(r) Phytophthora inJestons
LSE-12
4
Xanthophyta
86. What are slime moulds? Write a note on their veqetative
phase.
87. Compare the
pteridophytes.
characteristics of
bryophytes with
88. Describethe strobilusof Equisetum.
89. Discussthe reproductivestructuresoI Mqrchantia.
L S E - 12
P.T.O.
SECTION C
Nofe :
Answer any thtee questions. AII questions carry
equal marks.
Cl. What are fossils? How are they formed ?
10
C2. Discussthe economicimportanceof Algae'
10
describethe disease
c3. with the help of welllabelled'diagrams
cycle of late blight of potato or Puccinia graminis' Also
10
give the control measures'
C4. Give a brief account of various usesof Bryophytes'
10
C5. Illustratethe life cycle of a typical pteridophyteand describe
70
its featuresin detail.
L S E - 12
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L S E - 12
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LSE-12
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L S E - 12
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L S E - 12
12
2,000
BACHELOR OF SCIENCE (B.Sc.)
Term-End Examination
June, 2006
LIFESCIENCE
LSE-13: PLANTDIVERSITY-II
T i m e: 3 h o u r s
Note :
MaximumMarks: 75
Answer the questionsas directed in SectionsA, B
and C. Drqw labelleddiagrams,whereuernecessqry.
SECTION A
Note :
Answer aII questions.
Al. Fill in the blank(s)with the appropriateword(s):
7x5:5
(i)
The oil of Cedrus deodarqis usedin
(ii)
A modified stem can be recognised by the presence
and
of-and-.
(iii)
Saffron is obtained from the
of the
flower.
L S E - 13
P.T.O.
(iv) In aquaticplants aeration and buoyancyis providedby
tissue.
(v)
The botanical term for the fruit of pomegranate is
42. Explain each of the followingin one or two lines :
(i)
Albuminouscell
(ii)
Sessileleaf
7x5:5
(iii) Tetradynamousandroecium
(iv) Phylloclade
(v)
Pseudostem
A3. Answer each of the following in a few words :
7x5=5
(il
Name a gymnosperm whose pulp is used for
manufactureof superior quality paper.
(ii)
Name the gymnospermwhich is referredto as "big
lree" .
(iii) Name the family which is consideredto be the largest
amongstthe dicotyledons.
(iv) What is the term usedfor the plants that rely on birds
for pollination ?
(v)
LSE-13
Write the botanicalnameof the plant from which drug
is obtained for the treatment of malaria.
SECTION B
Note :
Answer only six questions. AII questions cq.rry
equal marks.
B1. Enumerate the differencesbetween monocot and dicot
stems.
82. Why are the cycadsconsideredas living fossils?
s
83. With the help of labelleddiagramsonly depict the life-cycle
of Pinus.
s
84. Describe the various forms of sclereids with
examples of each.
85. Summarize
the
various theories which
suitable
explain
the
morphological nature of carpel.
.
816. Write a general account of the botanv of wheat or maize
plant.
87 . Differentiatebetweenany two of.the following
(i)
Vegetativeshoot apex and Floweringapex
(ii)
Essentialoils and Vegetableoils
2|x2:5
(iii) Sapwoodand Heartwood
88. Write short notes on any two of the following :
(i)
Economic uses of gymnosperms
(ii)
Specialized stems
(iii)
Seed appendages
LSE-13
3
2|x2:s
p.T.O.
sEcTtoNc
Note :
Answer ony three questions.AII questions carry
equal marks.
Cl. Angiospermsare the most widelyspreadgroup in the plant
kingdom.Justifywith suitableexamples.
10
C2. Give a detailedaccountof the origin, cultivation,usesand
10
breedingprogrammesof rice.
Ca. (i)
(ii)
C4. (t
(ii)
C5. (i)
(ii)
Differentiateaberry from a drupe.
Describe the botanical features, ecology and uses of
4+6=70
mango.
List any five spicesalong with their botanicalnames,
families and plant part used.
Describecultivationand usesof any two spicesof your
5+5:70
choice.
Enlist the field recognitioncharactersand comment
on the morphologicaldiversity
of familyAsteraceaeor
Euphorbiaceae.
6
Compare the diagnosticfeaturesof Malvaceaeand
Rutaceae.
2
(iii) Describethe structuraldiversityof family Palmae.
L S E - 13
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L S E - 13
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L S E - 13
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L S E - 13
2,000