2014
LIFE SCIENCE
(BIFURCATED SYLLABUS)
Time- Three Hours Fifteen Minutes
(First fifteen minutes for reading the question paper only)
Full Marks-90
(For Regular and Sightless Regular Candidates)
Full marks-100
(For External and Sightless External Candidates)
FOR REGULAR, EXTERNAL AND SIGHTLESS
CANDIDATES
Special credit will be given for answers which are brief
and to the point. Marks will be deducted for spelling
mistakes, untidinessand bad handwriting.
[English Version]]
(Bifurcated Syllabus)
(For Class X Syllabus Only)
Directions
For Regular Candidates,the questions of Group 'A' , 'B'
and 'C'will have to be answered.
For External Candidates, the questions of Group 'D'
will also have to be answered in addition to group 'A',
'B'and 'C'.
Instructions regarding the number of questions to be
attempted have been indicated at the beginning of each
group.
Special Instructionfor Sightless Candidates
In Group 'C', instead of Question Nos. 12 and 13, any
one of the Question Nos. 12(A) and 13(A) will have to
be answered.
Group 'A'
[Candidates will have to answer question Nos. 1,2,3 and 4]1. Complete the sentences choosing the correct
answer (any five): 1x5=5
(i) Name of an efferent nerve is
(a) Auditory (b) Olfactory
(c) Optic (d) Occulomotor
(ii) Hormone that controls the tropic movement
in plant body is
(a) Auxin (b) Thyroxine
(c) Gibberellin (d) Cytokinin
(iii) The cell in a plant body which divides by
meiosis is the
(a) Spore mother cell
(b) Cell of apical bud
(c) Cell of a mature leafe
(d) Cell of root
(iv) If hybridization is made between a hybrid
tall pea plant and a pure tall pea plant, the
percentage of tall offsprings in F1 generation
(a) 25% (b) 50%
(c) 75% (d) 100%
(v) The erliest known ancestor of horse is
(a) Equus (b) Mesohippus
(c) Eohippus (d) Merichippus
(vi) The adaptive feature which is not found in
‘Sundari’ plant is
(a) Pneumetaphore
(b) Fruit with seed
(c) Leaves with thick cuticle
(d) Viviparous germination
(vii) The disease which could be transmitted
during blood transfusion is
(a) Hepatitis (b) Cholera
(c) Typhoid (d) Polio
2. Answer in one sentence (any ten) : 1x10=10
(i) Name one alkaloid that lowers high
blood pressure.
(ii) Name one inorganic substance that is
reabsorbed from renal tubule.
