1. Though there is no RBC inplace through blood because(A) Plasma contains Hb.(C) WBC contains Hb.Where is adrenal gland located in Frog(A) Lateral part of Kidney.(C) Anterior part of urinary bladder.

the blood of earthwofin, yet the transport of Az takes

fr%ldo l!

2.

3.

(B)(D)

?

(B)(D)

Peritoneal fluid contains Hb.Body-wall contains Hb.

Sunk in the Kidney.Posterior part of Kidney.

In plant, offsets are found.(A) Nephrolepis (B) Mint (C) OxalisWhich protease is secreted in active form ?

(A) Chymotrypsin (B) Pepsin (C) ErepsinHow many chambers are present in the he,art of Cockroach(A) 6 chambers (B) 3 chambers (C) 10 chambersThe tissue shown in the diagram is found in(A) Hlpodermis, Endodermis, Pericycle and Phloem"(B) Pericycle, Xylem, Phloem and Endodermis"(C) Hlpodermis, Pericycle, Secondary Xylem and Phloem.(D) Hypodermis, Pericycle, Epidermis and Phloem.

In Cockroach, for mosaic vision in(A) 200 (B) 100

Which plant do not have Perianth\) Pancratium (B) Potato

(D) Pistia

Trypsin

13 chambers

eye, how many ommatidium are present?

(c) 2000 (D) 1000

(C) Crinum (D) Rougainvillea

4.

)5.

6..

(D)?

(D)

9. Choose the correCt option(A) Interc alary meristem(C) Vascular cambiumChoose the incorrect pair

for prifrra* meristem.

(B) Laterul rneristem

. (D) Cork cambium

make ?

L0.

L3.

14.

19.

24.

(A) lst segment of Earthworm - Prostomium and mouth.

(B) 26th segment of, Earthwonn - Intestinal caecum and Typhlosole.

(C) 4th segment of Earthworm - Pharynx and Blood glands.

(D) l4th segment of Earthworm - Septal nephridia and Female genital pore.

11. Why typhlosole is present in Earthworm ?

(A) To digest the food mechanically. (B) To secrete more enzymes.

(C) To absorb digested food.

h the body wall of Cockroach,

(A) Pseudo-stratified epithelium

(C) Squamous epithelium

What does 'X' and 'Y' together

(D) To digest the food chemically.

12. the epidermis is made up of

(A) Bowman's capsule

(B) Glomerulus

(C) Blood capillary network

(D) Malpighian body

Name the artery which is formed by

(A) Dorsal aorta

(C) Carotid arch

15. In floral diagram, what does this (*)

(A) Irregular flower (B) Staminodes

16. Filum terminale is the last part of

17.

(A) Spinal cord (B) Muscle fibre (C) Vertebral column @) Nerve fibre

Which one is the correct option for Frog ?

(A) Oviparous and self fertilization. (B) Viviparous and internal fertilization.

(C) Oviparous and internal fertilization. (D) Oviparous and extdrnal fertilization.

Which tissue is absent in the underground part of plant ?

(A) Sclerenchyma (B) Xylem (C) Collenchyna (D) Parenchyma

Which of the following pairs is correct ?

(A) Dorsi ventral leaf - Only spongy tissue between epidermis.

(B) Isobilateral leaf - Pallisade tissue towards lower epidermis.

(C) Dorsi ventral leaf - Pallisade tissue below upper epidermis.

(D) Isobilateral leaf - Pallisade tissue below upper epidermis.

Which organic substance is stored in the aleurone layer of Maize seed ?

18.

(A) Vitamrn (B) Protein (C) Carbohydrate (D) Lipid

21. For what pupose, the leaves are modified into bladder like structure in,w,Sorne Plqttg ? r

(B) Columnar epithelium

(D) Cuboidal epithelium

the union of 2 artenes.

(B) Coeliaco mesentric artery

(D) Sciatic artery

symbol denote ?

(C) Incomplete flower (D) Mother axis

22.

23.

24.

25.

26.

27.

28.

29.

(A) For capturing insects.

(C) For absorption of water.

What is the composition of(A) Suberin and Pectin

(C) Cutin and Suberin

Name the organism present

(A) Rhizophora

(B) Rhizobium

(C) Nodule

(D) Rhizopus

(B) For protectlon.

(D) For photosynthesis.

Casparian strip ?

(B) Cutin and Pectin

(D) Suberin and Lignin

in the part marked as 'X' in the given figure.

Name the plant having Sympodial axis.

(A) Polyalthea (B) Ashoka (C) Cassuarina (D) Vitis

Choose the correct option for the sequence of segments in the walking legs ofCockroach.

(P) Tibia (Q) Trochanter (R) Coxa (S) Tarsus (T) Femur

(A) p Q, R, S, T (B) R, Q, T, R S (C) Q, T, R,S,P (D) S, T, Q, PR

Which tlpe of vascular bundle would you find when you observe TS. of Monocot

stem ?

(A) Conjoint, bicollateral, closed and scattered vascular bundle.

(B) Radial, bicollateral, open and scattered vascular bundle.

(C) Conjoint, collateral, closed and scattered vascular bundle.

(D) Conjoint, collateral, open and scattered vascular bundle.

Which among these is the innermost layer of Cortex ?

(A) Endodermis (B) Exodermis (C) Pericycle (D) Flypodermis

Which type of cells are present in human stomach muscles ?

(A) Multinucleated and Spindle shaped. @) Multinucleated and Spherical shaped.

(C) Uninucleated and Spindle shaped. @) Uninucleated and Cylindrical shaped.

Where does emulsification.take place and what is responsible for it ?

(A) Gall bladder and Bile salts. (B) Gall bladder and Lipase.

(C) Duodenum and Pancreatic juice. (D) Duodenum and Bile salts.

30. Match the following and choose the correct option..A' .B'

1. Neutrophil (a) 'S' shaped Nucleus

2. Eosinophil (b) Kidney shaped Nucleus

3. Basophil (c) Many lobed Nucleus

4. Monocyte (d) Bilobed Nucleus

(A) (1-d), (2-c), (3-a),

(C) (1-a), (2-c), (3-b),

(4-b)

(4-d)

(B) (1-c),

(D) (1-b),

(2-d), (3-a), (4-b)

(2-a), (3"c), (4-d)

31.

35.

Which tissue is not single layered ?

(A) Tr*insitional epithelium.

(C) Cuboidal epithelium.

(B) Columnar epithelium.

(D) Pseudo stratified epithelium.32. T-he prinuuy root is short lived in

(A) Mango (B) Srveet Pea (C) Wheat (D) Carrot33. what is the fiunction of 'x' in the given diagram?

(A) Protects the flower in bud stage.

(B) It protects only the Gynoecium. y,

(C) Attract insects for pollination.(D) Protects sepals and petals.

34, Multiparous cymose branching and whorled phyllotaxy are found in(A) Red Oleander (B) Mirabilis (C) Calotropis (D) Croton

36.

Gotu has taken 2 figs in breakfast. At noon he has taken an apple and at eveninghe has taken popcorn. Choose the correct option in sequenc. r.gu.ding the fruit hehas eaten.

(A) Simple true fruit, Syconus, Pome @) pome, Syconus, simple true fruit pome(c) simple true fruit, syconus. (D) syconus, pome, Simple true fiuitChoose the incorrect pair.

(A) Tuberous root - Sweet Potato (B) clinging root - Tinospora(C) 'Suckers'- Loranthus (D) Symbiotic root - BeanIn the buccal cavity of female frog, which aperture is absent ?

(A) Opening of vocal sac (B) Gullet(C) Eustachian aperture (D) Internal noskilchoose the correct option for the plant in which stem tendril is absent.(A) cucurbita (B) Bitter gourd (c) passion flower (D) Muchlen beckiaWhich digestive juice has no enzyrne?

(A) Pancreatic juice (B) Intestinal juice (c) Gastric juice (o; eite iuiceWhich plant possess bracteate flower ?

37.

38.

39.

40.

(A) Bougainvillea (B) Datura (C) Brinjal (D) Caesalpinia41. Assertion A : Blood differs from other connective tissue.

Reason R : Blood cells are not producing their own matrixtA) A is wrong but R is coffect. (B) A is coffect but R is wrong.

12.

(C) Both A and R are correct; but R is not the reason of A.(D) Both A and R are correct and R is the correct reason of A.Cicer arietinum is the scientific name of _ .

(A) Chana (B) Pegion pea (C) Green gram (D) Sweet peaIn which type of Placentation, formation of the false septum is found ?

43.

(A) Parietatr (B) Basal (C) Free central (D) Axile44. 'Ihe superman has been provided the following series of plants. He has been asked

to identi$r the inflorescence type of each plant and to arrange according to thesequence. which of the following option do you suggest to him?

(1) Caesalpinia (2) Onion (3) Musa (4) Tagetes

(A) Raceme, Umbel, Spadix, Capitulum (B) Umbel, Capitulum,(C) Raceme, Umbel, Capitulum, Spadix (D) Umbel, Capitulum,Choose the correct option for 'p', 'q' and 'r' from the given

Raceme, Spadix

Raceme, Spadix

diagram.45.

49.

(A) p - Perichondrium; q : Chondrocytes; r : Chondrin

(C)p-Chondrocytes;q_Lacunae; r:Nucleus I(D)p-Perichondrium; q_Cartilagelacunae;

r - Chondrocytes

46. Stomatal apparatus - X + Guard cell + YChoose the correct option providing proper explanation of X and Y(A) X : Stomata; Y : Epidermal cell (B) X : Mechanical cell; Y: Accessory cell

(C) X : Stomata; Y: Accessory cell (D) X : Accessory cell; Y: Epidermal cell

47. Statement P : The region of embryonic axis between plumule and cotyledons is calledHypocotyl.

Statement Q : In mono cotyledonous seed, thin and shield-shaped cotyledon is calledScutellum.

(A) P is wrong and Q is correct. (B) P is correct and Q is wrong.

(C) Both P and Q are wrong. (D) Both P and Q are corect.

48. Which one is not a sensory organ of Cockroach ?

(A) Maxillory palp (B) Anal cerci (C) Antennae

In the intervertebral disc, which tissue is present ?

(D) Anal style

50. On the basis of economic importance of the following plant, choose the correct option..A' .B'

(1) Indigofera (a) Medicines

(2) Ashwagandha (b) Fodder

(3) Tulip (c) Dyes

(4) Sesbania (d) Ornamental

(A) Calcified cafillage

(C) Sponry bone

(B) White fibro cartilage

(D) Yellow elastic cartilage

(B) (1-b), (2-c), (3-a), (4-d)

(D) (1-b), (2-d), (3.c), (4-a)(A) (1-c), (2-a),

(C) (1-c), (2-a),

(3-b), (4-d)

(3-d), (4-b)

Sf,'CTION.ANote : Do as directed; Question No. 1-8 (Each question carries 2 marks) 16

Describe the tissue present in the peritoneum of body cavity (Diagram not needed).

Explain modification of tap root for food storage (any 2).

Describe. the abdomen of Cockroach. ORExplain Hepatic cacae and Malpighian tubules of Cockroach.

Differentiate between Tracheids and Sieve cells (4 points).

Mention the location and functions of different Nephridia of Earthworm.

How does, an epiphlic plant manage water though they do not touch the soil ?

Describe the gland which acts as both exocrine and endocrine in Frog. ORDifferentiate between aerial and underground stems.

Explain the stele of underground organ of plant that possesses Exodermis. -

SE.CTION.Rr] Note: Question No. 9-14. Each question carries 3 marks.

9. Explain the chemical composition of Plasma.

10. Explain male reproductive system of Cockroach with the hplp of a figure.

10. Mention the name and location of the pores which are opening on ventral and

lateral sides of Earthworm.

11. Describe the structure of epidermis of monocot and dicot leaves.

12. Describe the types of Leaf.

Prrt Eq---...-#

16

ORventro-

on the above floral formula, describe the flower.

the given diagram identiff and write what denotes A + H. (any 6). OR

A

,{*\J

F

*u,HB

fr

t

13. Br, ffi, {, il 3+3,

Based

14. From

14. Mention the role of any 6 hormones in the process of digestion in Frog.SFCTION.C

15.

15.

L6.

17.

19.

Note : Question No. 15-18 @ach carries 4 marks). 12

Describe the type of inllorescence found in the following plants.

1. Caesalpinia 2. Mulberry 3. Heliotuopium 4. Hibiscus ORName and explain arry 4 tlpes of indehiscent dry fruits.Describe areolar connective tissue (exempt figure).Describe the stnrcture of heart of Frog and Explain the circulation of blood in it.Draw neat labelled figure of skin of Frog (Vertica Section) and list the functionsof skin (any 4 functions).

1. (A)

9. (A)

17. (D)

25. (B)

33. (A)

41. (D)

49. (B)

2. (B)

L0. (B)

tr 8. (C)

26. (C)

34. (A)

42. (A)

50. (c)

3. (D)

11" (C)

19. (C)

27. (A)

35. (D)

43. (A)

4. (C)

12. (B)

20. (B)

28. (C)

36. (B)

44. (A)

5. (D)

13. (D)

21. (A)

29. (D)

37. (A)

45. (D)

(c)

(c)

(D)

(B)

(D)

(D)

8' (B)

16. (A)

24. (D)

32. (C)

40. (A)

48. (D)

7. (C)

15. (B)

23. (B)

3L. (A)

39. (D)

47. (A)

SECTION.A

1. Describe the tissue present in the peritoneum of body cavity. (Diagram notneeded)

-+ Squamous epithelium is present in the peritoneum.

-+ The outermost layer of skin of frog is made up of squamous epithelium.

--) It forms the inner lining of lung alveoli, lining of blood vessels, Bowmen's capsules

of kidney, peritoneum of body cavity.

-+ The cells of this kind of epithelium are extremely thin and flat. All the cells are

arranged edge to edge and form delicate lining or covering.

--+ They are joined by cement material.

--+ In surface view, this tissue seems to be composed of flat tiles like that of pavement.

It is because of this appearance it is often known as the pavement epithelium.

--) Cells are thin, flat, and polygonal and with prominent round or oval nucleus.

-+ Functions : Its main function is protection of the underlying tissue.

2, Explain the modification of tap root for food storage.

--+ In.carrot, radish and beet, tap root stores food and becomes. fleshy.

-+ In carrot, the food storing tap root becomes conical. It is called conical tap root.

-+ In radish, it becomes fusiform in shape and hence it is called fusiform tap root.

-+ In beet, entire food is stored in the basal part of the root. Hence, the root suddenly

tapers into a thin thread-like structure. Such a root is called napiform tap root.

3. Describe the abdomen of Cockroach :

-+ Abdomen is made up of ten segments in both male and female cockroach.

--+ The terga of eight and 9th segments are covered under the tergum of 7th segement.

*) The l0th tergum possesses a median groove, Anus occur upper it.

-+ A pair of anal cerci is associated with the 10th tergum.

*+ Anal cerci are photoreceptor organ.

-) In male cockroach, a pair of anal styles develop from 9th stemum.

6.

14.

22.

30"

38.

46.

--) In female cockroach, the 8th and 9th sterna jointly form a genital pogch.

-+ The male genital opening occurs in mid-ventral region of 9th segment.

--+ The female genital opening occurs in the 8th segment.

OR

3. Explain - Hepatic cacae and Malpighian tubules of cockroach.

Hepatic cacae : Eight blind hepatic caeca occur in the midgut.

-+ Columnar cells of midgut helpatic caeca secrete enrpe.-+ Various proteolytic enzymes convert protein unit into amino acids.

-+ Through lipase fatty acid and glycerol are formed from lipid. Amylase produces thesugar from starch.

Malphigian tubules : At the junction of midgut and hind gut about 150 yellowish, threadlike malpighian tubules open.

--+ They are excretory units.

4. Differentiate between Tlacheids and Sieve cells.

Tracheids Sieve cells

[. It is the unit of xylem. 1. It is the unit of polem,

2. Dead cells. 2. Living cells

3. Shows the lignin deposition. 3. Cell watrl thin and un-thickened.

4. Transport water and minerals. 4. Transport food materials.

5. Mention the location and functions of different Nephridia of Earthwonn.

--+ In earthworm, three types of nephridia are found.

(D Septal nephridia : This type of nephridia are found from l5th segment to thelast segment, found on both sides of intersegmental septa which open into

. intestine.

(ir) Integumentary nephridia : Attached to the lining of the body wall fromsegment 3 to all. All these nephridia open into external surface of the bodythrough minute pores.

(iir) Pharyngeal nephridia : Present as three paired tufts in the 4th, 5th and 6thsegments. These nephridia discharge their waste into alimentary canal.

-+ These nephridia regulate the volume and composition of the body fluids.

6. How does anepiphytic plant manage water though they do not touch the soil.

--+ Some orchids live as epiphytes on the branches of trees in forests. They obtain onlya habitat &om the host.

-+ They do not obtain water, salts or prepared food from host.

-) They have no contact with soil.

*) They produce some adventitious roots which remain suspended in air. These rootsare spongy, long and greenish. These roots are called epiphytic roots.

-) A specialized "velamen tissue" occurs on their outer surface. The cells of this tissueare polygonal, thick walled and arranged in many layers and absorb moisture fromatmosphere.

' 7. Describe the gland which at as both exocrine and endocrine in Frog.

--+ Name of gland which act as exocrine and endocrine in frog is "Pancreas".

-+ Pancreas is pale in caloq situated at the j,.rnction between the stomach and duodenum.

-) The pancreas produces pancreatic juice which contains various enzymes which helpin digestion of protein, lipid and carbohydrates.

4 In side pancreas, there is found "islets of Langerhans".

--) Cells of Langerhans are endocrine in nature which secretes hormones like Insulinand Glucogon, directly into blood vessels.

--+ Insulin and glucogon maintain level of glucose in blood.

OR' 7. Differentiate between aerial and underground stems.

Aerial Stem Underground stem

(i) Aerial stem found out side soil (i) These stem found in side soil

(ii) They contain chlorophyll (ii) Always, they are chlorophylless.

(iii) Bears lea[ flower, seeds, etc. (iii) Rarely bears scaly leaf.

(iv) Ex. Sunflower stem. (iv) Ex. Ginger, Potato.

8. Explain the stele of underground organ of plant that possesses exodermis.--) Maize root or monocot root possesses exodermis....--+ Stele of maize root made up of... - Pericycle, conjunctive tissue, conductive tissue

and pith.-+ Below the endodermis, around the stele there is found pericycle, made by parenchyma.*+ Xylem and phloem are connected by conjunctive tissue.

-+ There are usually more than six exarch xylem bundles (polyarch) in monocot root.

-+ The protoxylem lies towards the peripheral side and metil(ylem lies towards the pith,the condition is called exarch.

--+ Pith is larger and well developed.*) Stele is radial, alternate and polyarch.

sF'cTroN-Btj Note : Question No. 9 to 14, each question carries 3 marks.

9. Explain the chemical composition of plasma.

Plasma : This is the fluid matrix or intercellular substances of blood. It is almost colorless. having faint yellow tinge.

4 It contains essentially seven classes of substances.

Plasma

IJJ+$.L.J.J

Water Salts Proteins Food Gases Wastes Hormones

--) Plasma is also rich in sodium and chloride ions.

*+ Plasma also contain K, Ca, Mn, POr3, HCO; and many other ions. It contains many

crystalloids and colloids. The colloids of plasma include plasma proteins (includingprothrombin and immunoglobulins).

-+

-+

It contains usually 80% water.

In addition to these, there are metabolic wasteammonia, carbondioxide and water.

products such as urea, uric acid,,

Various hormones are also present in plasma.

Plasma also contains protective substances such asand blood proteins like fibrinogen, prothrombin,

In adult humans normal blood sugar level afterl0 ml of blood.

cholesterol in humans normally ranges from 140 to 260 mg per 100 ml of serum.

Except required components for blood clotting of plasma is known as ..serum,,j

Explain male reproductive system of cockroach with the help of a figure.

'1"*'rlty,

organs.

Male reproductive systern consists of a pair ii

{'*figltil:;it

tlxlw<tt'tt-rt

which opens into ejaculatory duct throughseminal vesicle. The ejaculatory duct opensinto male gonopore sifuated ventrar toanus.

-i A mushroom shaped gland occurs insegments 6 to 7 . It is an accessoryreproductive gland.

-+ At the end of the abdomen, chitinous gonapophysis are located which form externalreproductive organs.

--) The sperms are stored in the seminal vesicles and are glued together in the formof bundles called spermatophores which are discharged during copulation.

OR10. Mention the name and location of the pores which are opening on ventral and

ventro-lateral sides of earthworrn.-+ The ventral surface of the earthworm is identified by the presence of genital pores.-+ Anterior end consists of mouth and prostomium.-+ Four pairs of spermathecal aperatures are found on the ventrolateral sides between

segments 516, 617, 718, 8/9 in the intersegmental grooves.-+ A single female genital pore is present in the mid-ventral line of the 14th segment.-+ A pair of male genital pore is present on the ventro-lateral Sides of the 18th segment.--) Number of minute pores called nephridiopores, get opened on the surface of body,

which are found in all the segments except the firsi, last and clitellum.-) Common prostate and spermatic duct opens to the exterior by a pair of male genital

pores on the venko-lateral side of the lgth segment.

Integumentary nephridia open on external surface of the body through minute pores.Female genital pore open on ventral surface of the l4th segment.

-+

-+10.

!.

antitoxins, agglutinins, lysine etc.albumins and globulins.

2 hrs of meal is 90- tZ} mg per

V*s*r*tcrtJnc e

tiixxtrfit:tut:$v rhi * t

of testis lying one on each lateral side inthe 4 to 6 abdominal segments.

From each testis arises a thin vas deferns,

-+

-)

{3*n*prl1:lr3r nes

11. Describe the structure of epidermis of monocot antl dicot leaves.

Epidermis of monocot leaves :

-) In monocot leaf, the stomata are present on both surfaces of epidermis. In the upper

epidermis of grass leaf, bulli-form cells occur at regular intervals.'They occur in groups

of5toTcells.-+ They lack cuticle and chloroplasts.

-+ Curved trichomes, they lose water and shrink. Thus they cause rolling of leaf blade.

As a result transpiration is reduced.

-+ In humid condition, they absorb watet swell and cause unrolling of leaf. As these

cells cause movement of leaf, they are also called motor cells.

Epidermis of dicot leaf : The parenchymatous single layer epidermis occur on both surface

of dicot leaf.

--) Upper and lower epidermis both are covered by cuticle. p. -+ Multicellular trichomes and stomata occur on both epidermis.

-+ The number of stomata is more in lower epidermis than in the upper epidermis.

12. Describe the types of leaf.

T}pes of leaf : Various types of leaf are as under :

1. Simple leaf : If a single lamina occurs in a leaf, it is called simple leaf.

-+ It has an axillary bud in its axil.

-+ Sometkimes, the lamina appears dissected from the margin. Such incisions divide

the lamina to a lesser or greater degree. However, this incision is not complete.

2. Compound leaf : If incision reaches the midrib or the tip the petiole, the lamina

is divided into independent leaf lets. Such a leaf is called compound leaf.

--+ The leaf let of compound leaf do not possess axillary buds.

--+ Compound leaf may be - (i) Pinnate or (ii) Palmate.

(l) In pinnate compound leaf, the leaf lets are arranged on both lateral sides ofthe main vein or midrib,

--) If the leaflets are arranged directly on the main midrib it is called unipinnate compound

leaf. e.g. Cassia.

-' If the midrib branches and the leaf lets arc affanged on these secondary branches,

the leaf is called bipinnate compound leaf. e.g. Caesalpinia, Acacia.

-+ If the leaf lets are alranged on tertiary or higher order branches, the leaf is called

multipinnate compound leaf. e.g. Moringa.

(ii) In palmate compound leaf, the leaflets are arranged on the tips of petiole.

-+ If a single leaflet is so arranged, the leaf is called unifoliate palmate compound leaf.

e.g. Lemon. -+ If two leaflets occur at the tip of petiole, it is called bifolicate palmate compound

leaf. e.g. Balanites.

-+ If many leaf lets are arranged, it is called multifoliate palmate compound leaf. e.g.

- Bombax, Aegle.

. -) There are some other types of leaves also, like as -(i) Cotyledon or seed leaf -+ Found in seed.

(ii) Scaly leaf -+ very small, reduced and papery leaf.

(iii) Bract -+ The leaf from the axil of which a flower

(iv) Sporophylls + Stamen and carpel of flower.

Ba G, {, PE*3 A3*3, Qrl

develops is called bracts.

14.

(iv)

14. From

AqC*+FqGqHqB4D*+E --+

Based on the above floral formula, describe the flower.

(i) Flower : Complete actinomorphic, bisexual, bracteate, hytogynous.

(iD Perianth : Perianth sepaloid or petaloid (3 + 3), free, valvate aestivation.

(iil) Androecium : Stamen six (3 + 3), free or peri-phyllous, filament long, introseor extrose.

Gynaecium : Tricarpellary, syncarpous, ovary superior, kilocular wfth manyovules, axile placentation.

the given diagram identiff and write what denotes A -+ H. (any six)

Olfactory nen/e

Olfactory lobe

Cerebral hemisphere I cerebrum

Pineal stalk

Diencephalon

Optic lobe

Cerebellum

Medulla oblongata (Hind brain)

hC

rATJ

mm

ffi

*

OR

14. Mention the role of any six hormones in the process of digestion in frog.

RoIe of hormones in process of digestion :

(i) Gastrin : lnduces gaskic gland for the secretion of gaskic juice.

(il) Enterogastrone : Reaches stomach and stop production of gastric juice.

(iiD Cholecystokinin : Contracts galls bladder and release bile juice into duodenum.

(lv) Secretin I Stimulates pancreas to secrete pancrcatic.F.(v) Pancreozy.i, J juice into deudenum.

(vi) Enterocrinin : Induce intestinal gland to secrete intestinal juice in intestine.

SECTION.C15. Describe the type of infloresence found in the following plants.

1. Caesalpinia : Peduncle or rachis is normally elongated and flowers are stalked,the infloresence is called - raceme.

e.g. Mustard, Caesalpinia

2. Mulbery : Infloresence is catkin type.

Axis of spike is weak and does not stand erect but is pendulous and all theflowers in the infloresence are unisexual.

r e.g. Acallpha, Mulberry

3. Heliotropium : Scorpioid cymose infloresence. tMain axis ends in a flower.

- Single lateral branches arise altemately on left and right sides

e.g. Heliotropium.

4. Hibiscus : Cymose solitary.

- In this tlpe of infloresence, only one pedicellate flower is bome, terminallyby the peduncle.

- A joint some where in the stalk demarcates the extent of peduncle and pedicel.

e.g. Argemone, Hibiscus.

OR

15. Name and explain any four types of indehiscent dry fruits.

$pes of indehiscent dry fruits :

-+ The wall of the ripened fruit does not dehisce. The pericarp decomposes in a naturalway and release the seeds.

-+ They develop from monocarpellary to polycarpellary synca{pous with one chamberand one ovule.

-) Indehiscent dry fruits are several types like as -(l) Caryopsis : The pericarp and the seed coat are fused and form hull. There

is single seed in fruit.

e.g. Maize, Wheat

(ii) Achene fruit : Pericarpand seed coat are free from one another. e.g. Naravelia,Ocimum.

(iir) Nut : The pericarp is very hard and stony. e.g. Cashewnut Trapa.

(rD Cypsela : The pericarp and the seed coat remain free from each other. e.g.

Tridax, Vernonia.

(v) Samara : The pericarp become flat like wings.

e.g. Holoptelea, Hiptage.

16. Describe areolar connective tissue. @iagram is not necessary)

Areolar connective tissue : Areolar connective tissue is made up. of fibres and cells.

-) There are two types of fibres, i.e. (i) White fibres - They are wav)i', unbranched. and aranged in bundles - white fibres are formed of a substance called protein -

collagen. (ii) Yellow fibres - They are few in numbers, yellow in colour, more slenderthan the white fibres. They are not arranged in bundles. They are single and branchedand joined with one another to form delicate network.

-+ Yellow fibres are made up of elastin protein.

-+ In this connective tissue there is three tlpes of cells are found -' (i) Fibro blast : Main cells, synthesize two kinds of protein - collagen and elastin.

(it) Macrophages/Ilistocytes : Able to move and ingest foreign particles, and isthus called macrophage. These cells help in the defense of the body.

substances.. heparin, histamine and

17. Describe the structure of heart of frogit.

(iii) Mast cells : Irregular in shape and large in rir.. .serotonin.

and explain the circulation of blood in

pericardium. In between

-*-a

-+

Structure of heart of Frog :

The heart is protected in side a double walled bag calledthese walls pericardium fluid is present.

The heart is located in the anterior region of coelom.

It is muscular, conical and three chambered (Two auricles and one ventricle) pulsativeorgan.

-+ On the dorsal side of heart "sinus-venosus" is located, which collects deoxygenatedblood from various parts of the body and empty up inio right auricle through sinu-auricular aperture.

*+ The left auricle receives oxygenated blood from lungs through a commonvein.

pulmonary

The blood from both auricles enter the ventricle through a single opening called"auriculo ventricular aperture".

Thus oxygenated blood from left auricle and deoxygenated blood from right auricleis mixed in ventricle.

-+ As a result in frog, mixed blood is circulated through arterial system.

-+ The ventricle contracts and forces the blood into truncus arterious from where it entersinto arterial system.

Circula(ion of blood in heart of frog :

Venous System

Sinusvenous

Pulmonary circulation

@I vern I

Arterial system

Arteries

Deoxygenated bloodfrom different parts of

Oxigenated bloodfrom lungs and

skin

Rightauricle

Ventricle

Truncusarterious

Auricloventricularaperature

Left auricle

Chart : Flow of blood in the heart of frog

18. Drew neat labelled ligure of skin of frog (Vbrtical stcfionl ilftr nst trGfutrtfionof skin. (Any four)

Function of skin :

(i) Skin gives definite shape and texture of the body

(ii) It protects the body against foreign bodies and fungi'

(iii) It acts as chief respiratory organ'

(iv) It acts as an important sensory organ.

(v) The frog never drinks water but absorb water through skin.

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Vertical section of the skin of Frog