TN 11th Question Paper 2025 Zoology

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8437
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!8437IstYearZoology!
PART - III
»[Q¯À / ZOOLOGY
( uªÌ ©ØÖ® B[Q» ÁÈ / Tamil & English Version)

Põ» AÍÄ : 3.00 ©o ÷|µ® ] [ ö©õzu ©v¨ö£sPÒ : 70
Time Allowed : 3.00 Hours ] [ Maximum Marks : 70

AÔÄøµPÒ : (1) AøÚzx ÂÚõUPЮ \›¯õP £vÁõQ EÒÍuõ GߣuøÚ \›£õºzxU
öPõÒÍÄ®. Aa_¨£vÂÀ SøÓ°¸¨¤ß AøÓ PsPõo¨£õÍ›h®
EhÚi¯õP öu›ÂUPÄ®.
(2) }»® AÀ»x P¸¨¦ ø©°øÚ ©mk÷© GÊxÁuØS®
AiU÷PõikÁuØS® £¯ß£kzu ÷Ásk®. £h[PÒ ÁøµÁuØS
ö£ß]À £¯ß£kzuÄ®.

Instructions : (1) Check the question paper for fairness of printing. If there is any lack of fairness,
inform the Hall Supervisor immediately.
(2) Use Blue or Black ink to write and underline and pencil to draw diagrams.

£Sv & I / PART - I
SÔ¨¦ : (i) AøÚzx ÂÚõUPÐUS® Âøh¯ÎUPÄ®. 15x1=15

(ii) öPõkUP¨£mkÒÍ |õßS ©õØÖ ÂøhPÎÀ ªPÄ® Hئøh¯
Âøhø¯z ÷uº¢öukzxU SÔ±mkhß Âøh°øÚ²® ÷\ºzx GÊuÄ®.
Note : (i) Answer all the questions.

(ii) Choose the most appropriate answer from the given four alternatives and write
the option code and the corresponding answer.

[ v¸¨¦P / Turn over

8437 2

1. ]Ö}º¨ø£ø¯a _ØÔ²ÒÍ }m] Enº÷ÁؤPÒ •ØÔ¾©õP }UP¨£k® ÷£õx
{PÌÁöußÚ ?
(A) ]Ö}º öÁÎ÷¯ØÓ® C¸US®
(B) öuõhº ]Ö}º öÁÎ÷¯ØÓ®
(C) ]Ö}º¨ø£°À ]Ö}º ÷\P›UP¨£kÁvÀø»
(D) ]Ö}º öuõhº¢x C¯À£õP ]Ö}º¨ø£°À ÷\P›UP¨£k®
What will happen if the stretch receptors of the urinary bladder wall are totally removed ?
(a) There will be micturition.
(b) Continuous micturition
(c) Urine will not collect in the bladder.
(d) Urine will continue to collect normally in the bladder.

2. Jzu £s¦PÎß uµzøu¨ ö£ØÓ E°›ÚUSÊ __________ BS®.
(A) ÷£›Ú® (B) ]ØÔÚ®
(C) Sk®£® (D) ÁøP£õmkz öuõSv
A group of organisms having similar traits of a rank is __________.
(a) Genus (b) Species
(c) Family (d) Taxon

3. RÌÁ¸ÁÚÁØÖÒ ©s¦Ê Eµ EØ£zv°À öuõhº£ØÓx Gx ?
(i) ©s ÁÍzøu¨ £õxPõzuÀ
(ii) PÛ©¨ ö£õ¸mPøÍ ]øuzuÀ
(iii) xøÍPÒ, PõØ÷Óõmh® ©ØÖ® Dµ¨£uzøu uUP øÁzuÀ ußø© ÷£õßÓÁØøÓ
AÎUQßÓx.
(iv) E°›¯À ]øuÄUSm£hõu P›©[PøÍ ]øuUQßÓx.
(A) (ii) ©ØÖ® (iv) uÁÖ (B) (i) ©ØÖ® (ii) \›
(C) (i) ©ØÖ® (iii) uÁÖ (D) (iii) ©ØÖ® (iv) \›
Which one of the following is not related to Vermiculture ?
(i) Maintains soil fertility
(ii) Breakdown of inorganic matter
(iii) Gives porosity, aeration and moisture holding capacity
(iv) Degradation of non bio-degradable solid waste
(a) (ii) and (iv) are not correct (b) (i) and (ii) are correct
(c) (i) and (iii) are not correct (d) (iii) and (iv) are correct

A

3 8437

4. RÌUPshÁØÖÒ ‰øÍ°ß G¢u £Sv v¸¨v/vPmhÀ ø©¯©õP ö\¯À£kQÓx ?
(A) øí¨÷£õu»õ©ì
(B) u»õ©ì
(C) î¨÷£õ÷P®£ì
(D) G¤u»õ©ì
Among the following, which part of the brain acts as the satiety centre ?
(a) Hypothalamus
(b) Thalamus
(c) Hippocampus
(d) Epithalamus

5. BUéõß £h»zvØQøh÷¯¯õÚ ªßÚÊzu® K´Ä {ø» ªßÚÊzuzøu Âh
AvP Gvº ªßußø©²øh¯uõPU Põn¨£mhõÀ {³µõß G¢u {ø»°À
C¸¨£uõPU P¸u¨£k® ?
(A) ªß •øÚ¨¤¯UP «m] (B) ªß •øÚ¨¤¯UP }UP®
(C) SøÓ ªß•øÚ¨¤¯UP® (D) Ea\ ªß•øÚ¨¤¯UP®
When the potential across the axon membrane is more negative than the normal resting
potential, the neuron is said to be in a state of :
(a) Repolarization (b) Depolarization
(c) Hypopolarization (d) Hyperpolarization

6. Áͺa] íõº÷©õß ªøP _µ¨£õÀ SÇ¢øuPÐUSz ÷uõßÖÁx :
(A) Q÷µÂß ÷|õ´ (B) Q›iÛ\®
(C) öhmhÛ (D) Cµõm\uzußø©
Hyper secretion of growth hormone in children leads to :
(a) Grave’s disease (b) Cretinism
(c) Tetany (d) Gigantism

7. J¸ \õuõµn ©ÛuÛß ‰a_UPõØÖ AÍÄ :
(A) 500 ª.¼ (B) 800 ª.¼
(C) 1100-1200 ª.¼ (D) 1200 ª.¼
The tidal volume of a normal person is :
(a) 500 mL (b) 800 mL
(c) 1100-1200 mL (d) 1200 mL

A [ v¸¨¦P / Turn over

8437 4

8. ©Ûu ‰øÍ°ß G¨£Sv EhÀ öÁ¨£{ø» Pmk¨£õmkhß öuõhº¦øh¯x ?
(A) •SÍ® (B) ]Ö‰øÍ
(C) øí¨÷£õu»õ©ì (D) ö£¸‰øÍ
Which part of the human brain is concerned with the regulation of body temperature ?
(a) Medulla oblongata (b) Cerebellum
(c) Hypothalamus (d) Cerebrum

9. uø\ |õ›¾ÒÍ BUêáøÚa ÷\ªUS® {Óª :
(A) ø©÷¯õ]ß (B) ø©÷¯õS÷Íõ¤ß
(C) BUiß (D) m÷µõ÷£õÛß
The pigment present in the muscle fibre to store oxygen is :
(a) Myosin (b) Myoglobin
(c) Actin (d) Troponin

10. Cµzua]Á¨£qUPÎß ¦Ó¨£µ¨¤À A ©ØÖ® B BßiáßPÒ EÒÍ J¸ |£º
G¢u Cµzu ÁS¨ø£a \õº¢uÁº ?
(A) AB (B) A (C) O (D) B
A person having both antigen A and antigen B on the surface of RBCs belongs to Blood
group :
(a) AB (b) A (c) O (d) B

11. ]i¤m »õºÁõ RÌUPsh G¢u öuõSvø¯a \õº¢ux ?
(A) xøͲh¼PÒ (B) i÷ÚõL÷£õµõ
(C) umøh¨¦ÊUPÒ (D) {÷h›¯õ
Cydippid larva belongs to which Phylum ?
(a) Porifera (b) Ctenophora
(c) Platyhelminthes (d) Cnidaria

12. PÚ\xµ ÁiÁ G¤w¼¯zvß •UQ¯¨£o :
(A) £õxPõ¨¦ (B) _µ¨¦
(C) EÔg_uÀ (D) (B) ©ØÖ® (C)
The main function of the cuboidal epithelium is :
(a) Protection (b) Secretion
(c) Absorption (d) Both (b) and (c)

A

5 8437

13. ]ÖSh¼À ö\¯ÀªS PhzuÀ {PÌa] ‰»® Gx EmQµQUP¨£kQßÓx ?
(A) Aª÷Úõ Aª»[PÒ (B) ÷\õi¯® A¯ÛPÒ
(C) SÐU÷Põì (D) ÷©ØTÔ¯ AøÚzx®
In small intestine active absorption occurs in case of :

(a) Amino acids (b) Na+

(c) Glucose (d) All the above

14. G¢u E°›Ú® uø»¨£Sv }UP¨£mh ¤ß¦® J¸ Áõµ® Áøµ E°º ÁõÊ® ?
(A) uÁøÍ (B) ©s¦Ê
(C) ¦Óõ (D) Pµ¨£õߧa]
Which creature can live for about a week without its head ?

(a) Frog (b) Earthworm

(c) Pigeon (d) Cockroach

15. RÌÁ¸ÁÚÁØÖÒ \›¯õÚ TØÖ Gx ?
(A) ö\U›iß ©ØÖ® öµõhõ¨êß BQ¯Ú £õ¼ö£¨øhk íõº÷©õßPÒ BS®.
(B) PõÀ]÷hõÛß ©ØÖ® øu÷©õ]ß BQ¯øÁ øuµõ´k íõº÷©õßPÒ.
(C) Põºi÷\õÀ ©ØÖ® BÀ÷hõìj÷µõß BQ¯øÁ ìjµõ´k íõº÷©õßPÒ
BS®.
(D) ö£¨]ß ©ØÖ® ¦÷µõ»õUiß Cøµ¨ø£°À _µUQßÓx.
Which one of the following statement is correct ?

(a) Secretin and Rhodopsin are polypeptide hormones.

(b) Calcitonin and Thymosin are thyroid hormones.

(c) Cortisol and Aldosterone are steroid hormones.

(d) Pepsin and Prolactin are secreted in stomach.

A [ v¸¨¦P / Turn over

8437 6

£Sv & II / PART - II
SÔ¨¦ : GøÁ÷¯Ý® BÖ ÂÚõUPÐUS ©mk® Âøh¯ÎUPÄ®. ÂÚõ Gs 24 &US
Pmhõ¯©õP Âøh¯ÎUPÄ®. 6x2=12
Note : Answer any six questions. Question No. 24 is compulsory.

16. C¸ÁõÌ塧 CÍ® E°› ©ØÖ® •vº E°›PÒ öÁÎ÷¯ØÖ® ø|mµáß
PÈĨ ö£õ¸mPÒ ¯õøÁ ?
What is the nitrogenous waste produced by amphibian larvae and by the adult animal ?

17. C¯ß ©¸zxÁ® (¤ê÷¯õöuµ¤) GßÓõÀ GßÚ ?
What is meant by Physiotherapy ?

18. G¤w¼¯z v_UPÎß H÷uÝ® |õßS ö\¯À£õkPøÍU TÖP.
Name any four important functions of epithelial tissue.

19. ©Ûu ö£¸[ShÀ Aø©¨ø£ £h® Áøµ¢x £õP[PøÍ SÔUPÄ®.
Draw and label the parts of human Large intestine.

20. _hº ö\ÀPÒ GßÓõÀ GßÚ ?
What are Flame cells ?

21. SÐU÷Põ«mh›ß H÷uÝ® Cµsk •UQ¯zxÁ® GÊxP.
Write any two significance of Glucometer.

22. A»› uø\°ß ÷Áø»PøÍ ÂÍUPÄ®.
Explain the functions of Alary muscles.

23. {n}º GßÓõÀ GßÚ ?
What is lymph ?

24. Tmk «ß Áͺ¨¦ GßÓõÀ GßÚ ?
What is composite fish farming ?

A

7 8437

£Sv & III / PART - III
SÔ¨¦ : GøÁ÷¯Ý® BÖ ÂÚõUPÐUS ©mk® Âøh¯ÎUPÄ®. ÂÚõ Gs 33 &US
Pmhõ¯©õP Âøh¯ÎUPÄ®. 6x3=18
Note : Answer any six questions. Question No. 33 is compulsory.
25. ©Ûu öÁÒøͯqUPÎß ÁøPPøÍ £h® ÁøµP.
Draw the different types of human WBC.

26. S¸mk ¦ÒÎ GÚ¨£kÁx Gx ? Hß AÆÁõÖ AøÇUP¨£kQÓx ?
Which is called the Blind Spot ? Why is it called so ?

27. ö£¯›kÁuØPõÚ Ai¨£øh ÂvPøÍ GÊxP.
Write the rules of Nomenclature.

28. «Òußø© |õ›øÇPøÍ «Òußø© Cøn¨¦ v_ÂÛßÖ ÷ÁÖ£kzxP.
Differentiate between elastic fibres and elastic connective tissue.

29. G¾®¦ «ßPÎß ‰ßÖ •UQ¯ £s¦PøÍU SÔ¨¤kP.
List three features that characterise bony fishes.

30. Am›ÚÀ PõºöhUêß AkUSPÎß ö£¯øµ GÊxP.
Name the layers of Adrenal Cortex.

31. SÖUSU P»¨¦ – Áøµ¯Ö.
Define Cross breeding.

32. ì¤U÷©õ©õ÷Úõ«mh›ß ©¸zxÁ •UQ¯zxÁ® GÊxP.
Write the clinical significance of sphygmomanometer.

33. yUPzvß ÷£õx Hß ]»º SÓmøh ÂkQÓõºPÒ ?
Why do some people snore during sleep ?

£Sv & IV / PART - IV
SÔ¨¦ : AøÚzx ÂÚõUPÐUS® Âøh¯ÎUPÄ®. 5x5=25
Note : Answer all the questions.
34. (A) Sa] ©ØÖ® T®¦ ö\ÀPøÍ ÷ÁÖ£kzxP.
AÀ»x
(B) øí£ºQøÍ^ª¯õ ©ØÖ® øí÷£õQøÍ^ª¯õ – ÷ÁÖ£kzxP.
(a) Differentiate between rod and cone cells.
OR
(b) Differentiate hyperglycemia from hypoglycemia.

A [ v¸¨¦P / Turn over

8437 8

35. (A) •xS|õqøh¯øÁPøÍ •xS|õnØÓøÁPμ¸¢x ÷ÁÖ£kzxP.
AÀ»x
(B) uÁøÍ°ß Bs CÚ¨ö£¸UP ©sh»zøu ÂÍUSP.
(a) Differentiate chordates and non-chordates.
OR
(b) Explain the male reproductive system of frog.

36. (A) PÀ½µ¼ß £oPøÍ GÊxP.
AÀ»x
(B) _Áõ\ {PÌÂß £i{ø»PøÍ Â›ÁõP ÂÍUSP.
(a) What are the functions of Liver ?
OR
(b) Explain in detail the steps involved in Respiration.

37. (A) ]Ö}º¨ö£¸UöPvº íõº÷©õÛß £o ¯õx ? Ax G[÷P E¸ÁõUP¨&
£kQÓx? Cuß _µ¨ø£ AvP›UPÄ®, SøÓUPÄ® yskÁx Gx ?
AÀ»x
(B) öuõhº EhØ£°Ø] ö\´Áuß |ßø©PÒ ¯õøÁ ?
(a) What is the function of antidiuretic hormone (ADH) ? Where is it produced and what
stimuli increases or decreases its secretion ?
OR
. (b) What are the benefits of regular exercise ?

38. (A) u©Û ©ØÖ® ]øµPøÍ ÷ÁÖ£kzxP.
AÀ»x
(B) Pµ¨£õß §a]°ß ö\›©õÚ ©sh»zøu £h® Áøµ¢x £õP[PøÍ
SÔUPÄ®.
(a) Distinguish between arteries and veins.
OR
(b) Draw a neat labelled diagram of the digestive system of cockroach.

-oOo-

A

Study Materials
Notes

Model Papers Class 6 Notes

Sample Papers Class 7 Notes
Half Yearly Sample Papers Class 8 Notes

Class 9 Notes
Important Resources
Class 10 Notes
Periodic Table
Class 11 Notes
Writing Skills / Formats

Maps of India / World Class 12 Notes

Books and Solutions

NCERT Books
NCERT Book Solutions
HC Verma Chapter Wise Solutions
RD Sharma Solutions
CGBSE Solutions