L. R. & S. M.

VISSANJI ACADEMY
Secondary Section 2024-25
Preliminar y Examinatio n
Subject: Biology

Std: 10 Marks: 80-------

Date: 22/01/202 5 Time: 2 Hrs
INSTRUCT IONS:-
• Answers to this paper must be written on the answer sheet provided
separately.
• Yo~ w_ill n~t be a llowed to write dun·ng the first 15 minutes.
• This t_1me 1~ to be spent in reading the question paper. ..
wnting 1h e
• The time gwen at the head of this paper is the time allowed for
answers .
• The intended marks for the questions or parts of questions are given alongside
the questions.
• This paper has 7 printed sides.
Section A is compulsory . AHempt any four questions from Section B.
The intended marks for questions or parts of questions are given in brackets [].

SECTION A
(Attempt all questions from this Section.)
Question 1.
Choose the correct answers to the questions from the given options. (Do
not copy questions, write correct answers only.) [15]
i. The Bharat Stage Emission norms enforced for the entire country on
April 1st, 2017 were :
(a) BS III Jh-}~BS N o (c) BSV (d) BS VI

ii. Which one of the following was not explained by Darwinism ?

(a) Natural selection (b) Struggl e for existence.
-~rrivaJ of the fittest 4 {d) Origin of spe c ies .

iii. Which day is perceived as world population day ?

(a) J 2th May (b) 14th June (c) 5th July j5U- 11th July .

iv. The middle piece of sperm provides -

(a) Gene (b) Food {c) Chromoso mes i5ll-Energy o

v. Which of the following is essential for the thyroid gland to make

thyroxin e?
(a) Sodium chlodde (b) Potassium chloride
(c) Cholestero l (g},{6djne '-

1
 vi. The front cham ber wh· h 1 of the lens and t h e
know n by th IC lies Ul·
•
corne a IS the 1·dd e
(a ) v1treou s c ham b er e terni O f
tn
: . charn ber-
~ queo us c h ambe r o (b ) Po s tenor
. (d) None of these
vii. Whic h of the follow ing is arts of the hindb rain ?
(a) Hy thal · 0 ne of the p
po amu s .(b}-Cereb eliurn ·
(c) Corp us c allosu m (d) Spina l cord
c~
0 ·A . .n.sse rt1on : The aggre gates of the cell bodie s or pen"kary ons of
neur ons form the synap se . fib 5
Reas on : Gang lia are the struc tures from whic h the
nerv e 1 er
.
may arise or enter into, wher eas the syna p se conn ects
two neur ons with a smal l gap in betw een.
(a) Bo t h t h e as s ertion and reaso n are true .
(b j Both th e ass er ti on and r eason are fal s e.
(c) Asse rtion is true and the reaso n is fal s e .
• ..{_g)--A ssertion is fal se a nd the r eason is true.

ix. Asse rtion : Thro mbin is the inact ive form of proth
romb in whic h i s
prod uced dlll'in g blood coag ulati on. · t
Reas on : Vitam in K, a fat solub le vitam in, is essen
tial for the
prod uctio n of proth romb in. ~
(a ) Both t he asser tion and r eason are true .
(b) Bot h th e assertion an d reas on are fals e .
(c) As s ertio n is true a nd the r eason is fal s e .
•~ sserti on is false a nd th e rea s on is true.

x. Wha t com pone nts serve as door s to regu late the hear
t's bloo d
flow ?
o ~ Val ves (b ) H eart w all (c) Se p tum (d) Cham bers

xi. Conv ersio n of seve ral gluc ose mole cules into starc h
is t e rmed as :
(a) Photolysis (b) Phosphory lation (c) Polym erization<l (d) Photo
- /
respi ration
xii. With incr ease in atmo sphe ric pres sure , the rate of tran
spira tion
will:
(a) Incre as e fa
Decr ease (c) Rem ains same (d) Incre ases rapid ly

xiii. Mar ine fish whe n plac ed in tap wate r burs ts beca use
of:
~ nd osmo sis (b) Exos mosi s (c) Diffu sion ld) Plasn 1olys 1s

2
 .,
t
Xiv \V .
• · hat is the probabi lity of product ion of dwarf offsprin gs in a cross
. . betwee n two heteroz ygous tall pea plants ?
lcl). . :_2 5 % (b) so~.-:1 (c) 7S% (ct) 100%

~"V. How many meiotic division s are necessa ry to produce 100 pollen
grains ?
(a ) 20
,,(!;)l-25 (c) 50 (d) 100
Questio n 2
- -~ - Name the followin g: [5}
(a ) The substan ce from which oxygen is evolved during pholosy nthesis.
- .\ @ }'Liquid \:v aste materia l produce d by factories .
(c} The structu re where photoph osphory lation takes place.
(d) The structu re of the kidney where glomeru lus is enclosed .
(e) The part of the human brain which controls body tempe rature .

_ii. Arrang e and rewrite the terms in each group in the correct logical
sequen ce beg~ni ng with the ,.,~ ord, that is ~nderli ned. [51
(a} Pulmon ary vein, Left Ventricl e, Aotta, Left -auricle .
\ L -,
(b) Sperm, Urethra , Sperm -auct , Epididy mis.
~ 7 ' s- ']
(c) S phase , Karyoki nesis , G 1 phase, Cy tokinesi s, G2 ph ase .
. - 1 \ ' ....,
(d) Pencycl e. Endode rmis, Root hair, Xylem , cortex .
... , 'I - C:
(e) Neande rthal, Homo Habilis, Homo E'r ectus, Cro -·Magno n,
I
0

Austral opith ecus, Homo sapiens .

iii~ Fill in the blanks with suitabl e words: (Write only answer s) l51
The upper limit _a_ which is at the time when fresh blood is pushin g
through rhe artery as a result of the ventric u lar contrac tion of the heart.
The loH'er limit _b_ is the one record ed when the wave has p assed over.
The normal blood pressur e for adults is _c _ _ mm in upper limit and _ d _ _
mm in lower limit. Blood pressur e can be measur ed with the help of a n
instrum ent called e

1v. -Choos e the odd one out from the followi ng terms and name the
catego ry to which the others belong : (51
(a) Deterg ents, Sewage , X-rays , Oil spills .
(b) Ovum , Corpus luteum , Scrotal sacs, Ovary.

3
 (c ) Growth hormone, TSH Vas • L}-L
. . , opress1n,
(d) Sneezmg, Coughing , Blinkin T ing,
{e) Cytokinin , Gibbcrell in, Auxi;: E~ylene,
ropriate ones
v . Match the items given in Column A with the rnos~ app [5]
in Column B and rewrite the correct matchin g pairs.
Column A Column B

(a) Liver y 1. Basic unit of brain

(b) Cy Lokinin S 2. Haploid ce ll

(c) Neu ron \ 3. Diffusion of re spiratory gase s

(d) Ova 2. 4. Formatio n of urea

(e) Stoma ~)
5 . Prevents ageing of plant parts

6. Found in kidney

7 . Stress hormone

SECTION B
(Attemp t any four question s from this Section. )

Q-g,estio n 3
/ i. What is a greenhou se ? \1 l
ii. ~ pand the following abbrevia tions : 121
(§i)' ODF (b) IAA
iii. State the exact location and function of Spleen . \21
iv. Mention site of synthesi s of the following plant hormone s : \21
(a) Gibberel lins (b) Ethylene
v. Given alongsid e is a schemat ic represen tation of the circulato ry s ystem
in man . Study the same and answer the uestions that follows : l31
VtnaCava

4
 {a) Labe l the parts 1 and 3 indic~te~ i n; t ht d iag__;ar-.n .
(b) N ame t h e valve foun d a.~ th e beg1n n, ;:-i? ,..,. , i..
the p~rt i J ; -,.ie .o a r-'- =v-,
·~-.. .,.·e,;J -,•.; .
0

( ) .
c Give one differen ce between cu s - and 2 ba<ok:c o r: :.."1-e-:r
structure.

Question 4
~ i. State Mendel' s law of independent ~ssortmen;:.
ii. Giv e any o ne cause and correction ior Presby opi a ·_L. ~
iii. Explain the site of secretion and rol~ of s omatot ronin. ·2
iv. State any two functions of Aqueous humour. - ·2
v. A woman with normal vision m~rie~ ~ man with n'3rma1 -,,i s:o =- --;:,e:,- - -
have a color blind son. Her husbana ct1es a'1d she marrie s a c o:or ':)~r _-:::
man. Show the type of children th at rnigh t be expected from m ;.s s e'.)c ::c
marriage and the proportion of each. ~2 -

~tion 5
i. Define - Speciation -' ·
~: E~plain the role of Prostate g_land _and Bulb~urethraJ glands . ·L -
111. Give first two steps involved m unne formation .
iv. We gargle with saline solu tion in case of throat infection . .J u s·.:~.--
2·
L
v. The following diagram showing a defect in :he mammaliar. e':e . -s..:-:.s,,; e:- -
1
l
the questions from the figure given alongs ide . - - ·2 1

(a) Name the defect.

(b) Give the cause of the defect wi Lh respect to Ey eball.
(c) Give the characteristic of the image formed on the retin a in & r..or.:.~ e::e.

Question 6
/ - i. Define the term Ganglia. _
ii. A candidate in order to study Lhe impon:ance of certain fact ors :::
photosy nthesis, took a Potted plant and kept it in the dark fo:- ove:r 24
hours. Then in the early hours of the morning she covered one of :...'--:e leaYes
with black paper in the centre only. She placed the potted plai.:: ~=--.'. ~:-:e
sunlight for a few hours and then tes ted the leaf \l,hich ,,.ras coYe: ec. -,~.ic.r-.
black paper for starch. Based on the above condition answer the :o~ko;:.r:.g
qu e stions: · 2-

5
 (a ) What a spect of photos)' ntJ . c·ing 1. nvcsl
. irYetl.Cd
t~ . ? • t?
1
· es,s w as 1J - " cr11T1cn
(b) Why was the plant k e pt in the dark before the exp - th es is. \'2 \
iii Give any two adaptations in rform Photosyn \2 \
l·v · Give exact location
. of the r 1caves. to pc
1 011
•
(a) Aortic semilunar valve ' 0W1ng ··
(b) Eustachian tube \J\
v. Draw a neat labeled diagram of Human sperm.

Question 7 \ \\
-7 1• Explain the term Ovulation C' r
· The need_ to
ii. . hm1t
. . the size
. of· the family is more vita
. l Lo d ay than c v • \2\
before. Give any two reasons for the same. h e utc.:rus o f
iii.Name the stru_cture formed by the villi of the embryo and t \21
the mother . Give any one significance of Lh a l structure. . and
iv. Give the exact number of Spinal nerves present in thorax regwn " l21
Lumbar regrnn in human beings. 13I
v. Draw a neat labeled diagram of the Malpighian body.

Question 8 11 I
/ i. Define Demography. 121
ii Mention the cause and symptoms of Acromegaly · e d on
Hi.D ifferen tia te between Lamarck's theory and Darwi 11 ' s th eury 1,as I I
evolution of new specie~. . , of 2
iv. Give any two Intra Utenne Devices used as a Mel h od \21
Contraception. . os th~t follow : \3\
v. Study the diagram given below and answer the queStloi c

.. - --- I
. -- 2
. , .--- 3
8
··--·---. 4
7
6

(a) Name the parts labeled 2 and 8

(b) Give the function of 4 and 7