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201.

Node of Ranvier occurs whereA. nerve is covered with myelin sheathB. neurilemma is discontinuousC. neurilemma and myelin sheath are discontinuousD. myelin sheath is discontinuous

Answer» Correct Answer - D
202.

Write whethere the following statements are true or false : (a) Nodes of Ranvier occur in non-myelinated nerve fibres. (b) Hyaline cartilage stores fat. (c ) Single unit smooth muscle contract rhythmically. (d) Transitional epithelium prevents loss of blood. (e ) Fibrin is associated with blood clotting.

Answer» (a) False (b) False (c ) True (d) false (e ) True.
203.

How do you differentiate a frog from a toadA. Frog has no exoskeleton but toad has scalesB. Frog respires through lungs but toad respires through skinC. Frog has no parotid glands but toad has a pair of themD. Frog has a tail toad has no tail

Answer» Correct Answer - C
A frog has no parotid glands but toad has a pair of them.
204.

In which of the following organisms, the excretory organs are correctly stated?A. Humans-Kidneys , sebaceous glands and tear glands.B. Earthworm-Pharyngeal , integumentary and septal nephridiaC. Cockroach-Malpighain tubules and enteric caecaD. Frog-Kidneys , skin and buccal epithelium

Answer» Correct Answer - B
205.

What special structure are present at the free surface of the epithelial cells ? Also mention the sites where epithelial cells such structures occur.

Answer» Microvilli on intestinal epithelium , stereocilia on cells lining vas deferens, cilia on pseudostratified epithelium of trachea, flagellum of spermatozoon.
206.

The ciliated columnar epithelial cells in humans are known to occur inA. Eustachian tube and stomach liningB. bronchioles and Fallopian tubeC. bile duct and oesophagusD. Fallopian tube and urethra

Answer» Correct Answer - B
207.

Assertion: Epithelial tissue provides a covering or a lining for some parts of the body. Reason: Epithelial tissue has a free surface, which faces either a body fluid or the outside environment.A. If both assertion and reason are true and the reason is the correct explanation of the assertionB. If both assertion and reason are true but reason is not the correct explanation of the assertionC. If assertion is true but reason is falseD. If both assertion and reason are false

Answer» Correct Answer - A
Epithelial tissue provides a covering or a lining for some part of the body as epithelial tissue has a free surface, which faces either a body fluid or the outside environment.
208.

Mention the function of the following (a) Ureters in frog (b) Malpighian tubules (c) Body wall in earthworm

Answer» (a) In male frog, ureter conducts both urine and spermatozoa to the cloaca. Hence , it is also called urinogenital duct in male frog. In female frog, ureter conducts only urine from kidneys to the cloaca.
(b) Malplghian tubules are the organs of excretion and osmoregulation in insects
(c) Body wall in earthworm protects the delicate internal organs (viscera ) from injury. It also produces setae.
209.

In female cockroach, how many ovarian tubules or ovarioles are present ?A. 8B. 16C. `14-16`D. `9-10`

Answer» Correct Answer - B
In female cockroach, 16 ovarian tubules or ovarioles are present.
210.

Assertion: Periplaneta americana is uricotelic insect. Reason: Malpighian tubules absorb nitrogenous waste products and convert them into uric acid which is excreted out through the hindgut.A. If both assertion and reason are true and the reason is the correct explanation of the assertionB. If both assertion and reason are true but reason is not the correct explanation of the assertionC. If assertion is true but reason is falseD. If both assertion and reason are false

Answer» Correct Answer - A
Periplaneta americana is uricotelic insect as malpighian tubules absorb nitrogenous waste products and convert them into uric acid which is excreted out through the hindgut.
211.

A ring of 6-8 blind tubules present at the junction of foregut and midgut and are calledA. Gastric caecae which secrete digestive juiceB. Hepatic caecae which secrete digestive juiceC. Intestinal caecae which help in grinding the foodD. Both A and B

Answer» Correct Answer - D
A ring of 6-8 blina tubules present at the junction of foregut and midgut is called gastric or hepatic caecae which secrete digestive juice.
212.

Malpighian tubule are present at the junction ofA. Foregut and midgut, and help in the secretion of digestive enzymesB. Midgut and hindgut, and help in the grinding the food particlesC. Foregut and midgut, and help in the removal of excretory products from haemolymphD. Midgut and hingut, and help in the removal of excretory products from haemolymph

Answer» Correct Answer - D
Malpighian tubules are present at the junction of midgut and hindgut, and helpsin the removal of excretory products from haemolymph.
213.

The function of the gap junction is toA. Facilitate communication between adjoining cells by connecting the cytoplasm for rapid transfer of ions, small molecules and some large moleculesB. Separate two cells from each otherC. Stop substance from leaking across a tissueD. Performing cementing to keep neighbouring cells together

Answer» Correct Answer - A
The function of the gap junction is to facilitate communication between adjoining cells by connecting the cytoplasm for rapid transfer of ions, small molecules and some large molecules.
214.

The targa, sterna and pleura of cockroach body are joined byA. Arthrodial membraneB. cartilageC. Cementing glueD. Muscular tissue

Answer» Correct Answer - A
The terga, sterna and pleura of cockroach body are joined by arthrodial membrane/articular membrane.
215.

The hepatic portal vein dranis blood to liver fromA. stomachB. kidneysC. intestineD. heart

Answer» Correct Answer - A::C
216.

Give the functions of setae in earthworm.

Answer» (i) Setae help in locomotion . (ii) They aid earthworm in climbing out of the burrow . (iii) When pulled by an enemy from the burrow, these are extended by the animal into the walls of the burrow for firm attachment. (iv) They keep the two copulating worms together during reproduction.
217.

Which segments of the adult earthworm lack setae.

Answer» First, last and clitellar.
218.

Where are the new segments formed in a growing earthworm ?

Answer» In front of last (anal) segment.
219.

What is amplexus ? Where is it found ?

Answer» Mating in which eggs as well as spermatozoa was shed in water, amphibians.
220.

The correct sequence of different layers in the body wall of the earthworm from outer to inner side isA. Cuticle, epidermis, circular muscle layer, longitudinal muscle layer and coelomic epitheliumB. Cuticle, epidermis, longitudinal muscle layer, circular muscle layer and coelomic epitheliumC. Coelomic epithelium, epidermic, longitudinal muscle layer and cuticleD. Cuticle, epidermis, coelomic epithelium, circular muscle layer and longitudinal muscle layer

Answer» Correct Answer - A
The correct sequence of different layers in the body wall of the earthworm from outer to inner is cuticle, epidermis, circular muscle layer, longitudinal muscle layer and coelomic epithelium.
221.

(i) Which type of epithelium forms epidermis of the skin in land vertebrates ? (ii) What is the function of its horny layers ? How such horny layers develop ?

Answer» (i) Keratizined stratified squamous epithlium.
(ii) Its horny layers prevent loss of water and mechanical injury.
In the outer few layers of stratified squamous epithelium, the cells replace their cytoplasm with a hard, water proof protein, keratin by the process called keratinization, forming layers of dead cells stratum corneum or horny layer.
222.

Name the two layers of the basement membrane and the perichondrium.

Answer» Basal lamina and fibrous (reticular) lamina of basement membrane, and fibrous layer and chondrogenic layer of perichondrium.
223.

Match the items listed in column I with appropriate items given in column II : `{:("Column I",,"Column II"),("(a) Perichondrium",,"(a) Blood"),("(b) Basal granules",,"(b) Connective tissue"),("(c) Pseudostratified epithelium",,"(c) Absorption"),("(d) Plasma",,"(d) Absorption"),("(e) Matrix",,"(e) Trachea"),("(f) Neurilemma",,"(f) Cartilage"),("(g) Striated myofibril",,"(g) Bone marrow"),("(h) Haemopoietic tissue",,"(h) Body cavity lining"),("(i) Mesothelium",,"(i) Multinucleate"),("(j) Microvilli ",,"(j) Cilia"):}`

Answer» (a)(f) , (b) (j) , (c ) (e ) , (d) (a) , (e ) (b) , (f) (d) , (g) (i) , (h) (g) , (i) (h) , (j) (c ).
224.

Match the items given in column I with given items (one or more) of column II.

Answer» (i) c (ii) e (iii) a (iv) b, d (v) f.
225.

Assertion: The product of endocrine gland is secreted directly into the fluid bathing the gland. Reason: Endocrine gland are ductless or tubeless glands.A. If both assertion and reason are true and the reason is the correct explanation of the assertionB. If both assertion and reason are true but reason is not the correct explanation of the assertionC. If assertion is true but reason is falseD. If both assertion and reason are false

Answer» Correct Answer - A
The product of endocrine gland is secreted directly into the fluid bathing the gland hence endocrine gland are ductless or tubeless glands.
226.

Spermathecal pores of Pheretima are present inA. `5//6, 6//7, 7//8` and `8//9`B. `6//7, 7//8, 8//9` and `9//10`C. `1//2, 2//3, 3//4` and `4//5`D. `14//15, 15//16, 16//17` and `17//83`

Answer» Correct Answer - A
Spermathecal pores of Phertima are present in `5//6, 6//7, 7//8` and `8//9`.
227.

Smooth muscles areA. Involuntary, cylindrical striatedB. voluntary, spindle-shaped, uninucleateC. Involuntary, fusiform, non-striatedD. Voluntary, multinucleate, cylindrical

Answer» Correct Answer - C
228.

Based on their location, muscles are classified inotA. Three types- skeletal, smooth and cardiac muscleB. Three types- skeletal, visceral and cardiac muscleC. Three types- voluntary, involuntary and cardiac muscleD. All of the above

Answer» Correct Answer - A
Based on their location, muscles are classified into three types-skeletal, Smooth and cardiac muscle.
229.

The types of muscles present in our `:`A. heart is involuntary and unstriated smooth muscleB. intestine is striated and involuntaryC. thigh is striated and voluntaryD. upper arm is smooth muscle and fusiform in shape

Answer» Correct Answer - C
230.

The excess of nutrients which are not used immediately are converted into fats and stored inA. Areolar tissueB. Adipose tissueC. Dense regular connective tissueD. Dense irrengular connective tissue

Answer» Correct Answer - B
The excess of nutrients which are not used immediately are converted into fats and stored in adipose tissue.
231.

Which of the following is correct for the common cockroach ?A. Malpighain tubules are excretory organs projecting out from the colonB. Oxygen is transported by haemoglobin in bloodC. nitrogenous excretory product is ureaD. the food is ground by mandible and gizzard

Answer» Correct Answer - D
232.

Which of the following is correct for the common cockroach ?A. Nitrogeneous excretory products is ureaB. Food is grind by mandibles and gizzardC. Malpighian tubules are excretory organs that project out from coelomD. Oxygen is transported by haemoglobin in blood

Answer» Correct Answer - B
In cockroach:
(a) Nitrogeneous excretory products is uric acid.
(b) Food is grind by mandibles and gizzard.
(c) Malpighian tubules are excretory organs that project out from junctions of midgut and hindgut.
(d) Oxygen is not transported by blood.
233.

Which one of the following structures in Pheretima is correctly matched with its function ?A. Clitellum-secretes cocoonB. Gizzard-absorbs digested foodC. Setae-defence against predatorsD. Typhlosole-storage of extra nutrients

Answer» Correct Answer - A
In Pheretima, clitellum secretes cocoon.
234.

Neuroglial cells male up more thanA. One-third the volume of neural tissue in our body and, form and protect the neurons.B. One-half the volume of neural tissue in our body and, form and support the neurons.C. One-half the volume of neural tissue in our body and, protect and support neurons.D. One-third the volume of neural tissue in our body and, protect and support neurons.

Answer» Correct Answer - C
Neuroglial cells make up more than one-half the volume of neural tissue in our body and, protect and support neurons.
235.

(a) Which protein forms (i) white fibres and (ii) yellow fibres of the areolar tissue. (b) List different types of cells present in the areolar tissue. Also, mention their functions (s).

Answer» (a) White fibres are formed of collagen protein while yellow fibres are formed of elastin protein.
(b) Different types of cells of areolar tissue are :
(i) Fibroblasts and fibrocytes. Fibroblasts secrete matrix and the material of which fibres are formed. Inactive fibroblasts are called fibrocytes. They are small and change into fibroblasts to secrete fibres during wound healing.
(ii) Macrophages or Histocytes. These engulf the microbes, foreign bodies and damaged cells.
(iii) Mast cells. They secrete heparin and histamine.
236.

Fill in the blanks: a. The...1...tissue is closely attached to skeletal bones. b. The...2...fibres taper at both ends (fusiform). c. The...3...fibres are found in wall of internal organs such as stomach and intestine. d. Communication junctions or intercalated discs are found in...4....tissue.A. 1 and 3-skeletal muscle, 2-smooth muscle, 4-cardiac muscleB. 2 and 4-skeletal muscle, 3-smooth muscle, 1-cardiac muscleC. 1-skeletal muscle, 2 and 3-smooth muscle, 4-cardiac muscleD. 1 and 4-skeletal muscle, 3-smooth muscle, 4-cardiac muscle

Answer» Correct Answer - C
• The skeletal muscle tissue is closely attached to skeletal bones.
• The smooth muscle fibres taper at both ends (fusiform).
• The smooth muscle fibres are found in wall of internal organs such as stomach and intestine.
• Communication junctions or intercalated disc are found in cardiac muscle tissue.
237.

In mouthparts of Cockroach, galea and lacinia from part ofA. LabrumB. LabiumC. MandibleD. Maxilla

Answer» Correct Answer - D
In mouthparts of Cockroach, galea and lacinia form part of maxilla.
238.

Areolar connective tissue joinsA. bones with bonesB. fat body with musclesC. integument with musclesD. bones with muscles

Answer» Correct Answer - C
239.

In the earthwormA. integumentary and pharyngeal nephridia are exonephricB. Pharyngeal and septal nephridia are enteronephricC. pharynegeal and septal nephridia are exonephricD. integumentary and septal nephridia are enteronephric

Answer» Correct Answer - B
240.

Male and female cockroaches can be distinguished externally throughA. Anal styles in maleB. Anal cerci in femaleC. Anal style and antennae in femalesD. Both B and C

Answer» Correct Answer - A
Male and female Cockroaches can be distinguished externally through and styles in male.
241.

Cockroaches areA. ureotelicB. ureotelic or ammonotelicC. uricotelicD. Ammontelic

Answer» Correct Answer - C
242.

In male cockroaches, sperms are stored in which part of the reproductive systemA. Seminal vesiclesB. Mushroom glandsC. TestersD. Vs deferens

Answer» Correct Answer - A
243.

Mucus, saliva, earwax, oil, milk and digestive enzymes are secreted byA. Exocrine glandsB. Endocrine glandsC. Heterocrine glandsD. Compound glands

Answer» Correct Answer - A
Musus, saliva, earwax, oil, milk and digestive enzymes are secreted by exocrine glands.
244.

Match the columns I and II, and choose the correct combination from the options given. `{:(Column I, Column II),(a."Adhering",1."Help of stop substances from leaking across a tissue"),(b."Gap Junctions",2."Perform comenting to keep neighbouring cells together"),(c."Tight Junctions",3."Facilitate the cells to communicate with each other"):}`A. `a-3,b-2, c-1`B. `a-2,b-3,c-1`C. `a-2,b-1,c-3`D. `a-1,b-3,c-2`

Answer» Correct Answer - B
`{:(a."Adhering Junction",2."Perform cementing to keep"),(,"neighbouring cells together"),(b."Gap",3."Facilitate the cells to"),(,"communicate with each other"),(c."Tight Junctions",1."Help to stop substances from"),(,"leakings across a tissue"):}`
245.

Match the columns I, II and III and choose the correct combination from the options gives. `{:(Column I, Column II, Column III),(a."Testes",K.2^(nd)-6^(th)"segments",w.1"pair"),(b."Ovaries",L.4^(th)-6^(th)"segments",x.2"pairs"),(c."Spermathecae",M.6^(th)-7^(th)"segments",y.4"pairs"),(d."Mushroom shaped gland"(s),N.6^(th)"segments",z."Single"):}`A. `a-L-y, b-K-x, c-M-z, d-N-w`B. `a-L-w, b-K-w, c-N-w, d-M-z`C. `a-K-x,b-L-w, x-N-y, d-M-z`D. `a-N-x, b-M-w, c-K-z, d-L-y`

Answer» Correct Answer - B
`{:(a."Testes",L."4-th-6th segments",w."1pair"),(b."Ovaries",K."2nd-6th segments",w."1pair"),(c."Spermathecae",N."6th segments",w."1pair"),(d."Mushroom shaped gland",M."6th-7th segments",z."Single"):}`
246.

How would you differentiate between lymph and blood based on their constitution ?

Answer» Lymph consists of a clear, fluid matrix plasma, and floating amoeboid cells, the white corpuscles, mostly lymphocytes. It differs from blood in lacking R.B.Cs, platelets and some blood proteins.
247.

Select the incorrect statement about frog.A. Body is divisible into head and trunk onlyB. Forelimbs ends in five digits and they are larger and muscular than hind limbs that ends in four digitsC. The forelimbs and hind limbs help in swimming, walking, leaping and burrowin. Feet have webbed digits that help in swimming.D. The digestive system of frog consist of alimentary canal and digestive glands

Answer» Correct Answer - B
Hindlimbs ends in five digits and they are larger and muscular fore limbs that ends in four digits
248.

Read the following statements and find out the incorrect statement about frog.A. Frog never drinks waterB. In frog, neck and tail are absentC. The duodenum receives bile from gall bladder and pancreatic juices from the pancreas through the hepato-pancreatic ductD. Eyes of frog are covered by nictiating membrane that protects them while in water

Answer» Correct Answer - C
The duodenum receives bile from gall bladder and pancreatic juice from the pancreas through a common bile duct.
249.

During the peak summer and winter the frogs take shelter in deeo burrows to protect them from extreme heat and cold. This is called asA. Summer sleep (aestivation) and winter sleep (hibernation)B. Summer sleep (hibernation) and winter sleep (aestivation)C. Summer sleep (diapause) and winter sleep (suspend)D. Summer sleep (dormancy) and winter sleep (diapause)

Answer» Correct Answer - A
During the peak summer and winter the frogs take shelter in deep burrows to protect them from extreme heat and cold. This is called as summer sleep (aestivation) and winter sleep (hibernation).
250.

Assertion: The indian bull frog Rana tigrina is cold blooded or poikilothermic animal. Reason: Frogs do not have constant body temperature i.e, their body temperature varies with the temperature of the environment.A. If both assertion and reason are true and the reason is the correct explanation of the assertionB. If both assertion and reason are true but reason is not the correct explanation of the assertionC. If assertion is true but reason is falseD. If both assertion and reason are false

Answer» Correct Answer - A
The Indian bull frog Rana tigrina is cold blooded or poikilothermic animal because it does not have a constant body temperature, i.e., their body temperature varies with the temperature of the environment.