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451.

In frog each cardiac cycle begin with the contraction ofA. right auricleB. left auricleC. interauricular septumD. sinus venosus

Answer» Correct Answer - D
452.

where are sclerties present in cockroch ?

Answer» Sclerites are present in all body segment of cockroch . These are of two types
Dorsal sclerites often known as tergites ,and
Ventral sclerites which are referred to as sternites .
453.

Funnel-shaped ciliated pits on the ventral side of kidney of FrogA. nephridioporesB. nephrostomesC. neurotomesD. coelomostomes

Answer» Correct Answer - B
454.

Basement membrane is made up ofA. only epidermal cellsB. only endodermal cellsC. Both (a) and (b)D. no cell at all , but is a product of epithelial cells

Answer» Correct Answer - d
The cells of epithelial tissues rest upon a thin layer composed of protein bound mucopoly- saccharictes and glycoproteins, both secreted by P.pithelial cells (hence, product of epithelial cell) along with a layer of collagen fibres of the underlying connective tissue.
455.

Vitamin K is required forA. formation of thromboplastinB. conversion of fibrinogen to fibrinC. conversion of prothrombin to thrombinD. synthesis of prothrombin

Answer» Correct Answer - d
Vitamin-K (phylloquinone) is required for the synthesLS of prothrombin necessary for blood clotting. It is synthesised by bacteria in the colon Vitamin-K is commonly called anti-haemorrhagic vitamin. Its deficiency leads to bleeding, i.e. no coagulation or clotting.
456.

Epithelial tissue with thin flat cells appearing like packed tiles occurs onA. inner lining of cheekB. inner lining of stomachC. inner lining of Fallopian tubesD. inner lining of ovary

Answer» Correct Answer - d
Epithelial tissue with thin flat cells appearing like packed tiles occurs on inner lining of ovary. It is called germinal epithelium.
457.

Compound eyes are found inA. frogB. earthwormC. cockroachD. roundworm

Answer» Correct Answer - C
458.

What is synapse?

Answer» Synapse is a functional junction between the nerve endings of one neuron and the dendrites of the next neuron
459.

Which muscles never get fatigued ?

Answer» Correct Answer - Cardiac muscles
460.

Given below are four statement A to D regarding frog. Choose the option in which all the statement are correct? A- Salivary galnds are absent in frog, so digestion starts in stomach. B- The skull of frog is dicondylic C- Frogs never dring water but absorb it through the skin. D- Eyes of frogs exhibit binocular vision.A. A & B onlyB. A, B & CC. C & D onlyD. A,B,C & D

Answer» Correct Answer - B
A, B & C
461.

Mark the false statement w.r.t. frogA. A mature female frog can lay 2500 to 3000 ova at a timeB. Fertilisation is external and takes place on landC. Thyroxine hormone is required for metamorphosis of tadpole to form the adultD. Tadpole larva has a long coiled spring like instestine.

Answer» Correct Answer - B
Fertilisation is external and takes place on land
462.

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

Answer» Correct Answer - D
463.

During active period, maximum respiratory activity is throughA. Cutaneous respirationB. Brachial respirationC. Pumonary respirationD. Buccopharyngeal respiration

Answer» Correct Answer - C
Pumonary respiration
464.

Mark the false statement w.r.t. cockroachA. Excretion is performed by Malpighian tubules which occur at the junction of midgut and hindgutB. Cockroach is uricotelicC. Blood vascular system of cockroach is closed typeD. Respiratory system consists of a network of trachea, that open through 10 pairs of spiracles

Answer» Correct Answer - C
Blood vascular system of cockroach is closed type
465.

Which is not true about frog?A. Salivary glands are absentB. Maxillary teeth are arranged along the margin of upper jaw and the lower jaw is ttothlessC. Muscular tongue is bilobed at tip and free from behindD. Tadpole larva of frog has a short alimentary canal

Answer» Correct Answer - D
Tadpole larva of frog has a short alimentary canal
466.

Poison glands are usually present in the skin ofA. FrogsB. ToadsC. NewtsD. None of these

Answer» Correct Answer - B
467.

Which is not true about frog?A. Salivary glands are absent.B. Maxillary teeth are arranged along the margin of upper jaw and the lower jaw is toothless.C. Muscular tongue is bilobed at tip and free from behind.D. The tadpole larva of frog has a short alimentary canal.

Answer» Correct Answer - D
468.

Frog isA. HomoeothermicB. PoikilothermicC. HomeostaticD. Warm-blooded

Answer» Correct Answer - B
469.

Capacity of amphibians to change colour is calledA. SynchronousB. MetachronousC. MetachrosisD. None of these

Answer» Correct Answer - C
470.

Earthworm and cockroach both haveA. Dorsal nerve cordB. Unsegmented bodyC. Malpighian tubuleD. Ventral nerve cord

Answer» Correct Answer - D
Ventral nerve cord
471.

Sarcomere is the unit ofA. ContractionB. RelaxationC. Contraction and relaxationD. None of the above.

Answer» Correct Answer - C
472.

Uninucleate muscles areA. Smooth musclesB. Skeletal musclesC. Voluntary musclesD. All the above .

Answer» Correct Answer - A
473.

Myosin filaments are localized inA. Z - BandB. H-BandC. A- BandD. None of the above.

Answer» Correct Answer - b
474.

How many ovarioles are found in each ovary of cockroach ?A. 3B. 2C. 8D. 16

Answer» Correct Answer - C
475.

Collaterial glands of cockroach help in :A. fertilizationB. formation of oothecaC. copulationD. formation of oothecal chamber

Answer» Correct Answer - B
476.

Which one of the following statement is true for cockroach ?A. The number of ovarioles in each ovary are tenB. The larval stage is called caterpillarC. Anal styles are absent in femalesD. They are ureotelic

Answer» Correct Answer - C
Anal styles are paired, thin, unjointed outgrowths, projecting backwardly from the sides of `9^(th)` sternum of the male cockroach only. They are absent in females. The number of ovarioles in each ovary are eight. The larval stage of cockroach is called nymph. Cockroach is uricotelic.
477.

Assertion : Stomach and intestine of our body has columnar epithelium Reason : Columnar epithelium helps is secretion and absorption.A. If both assertion and reason are true and reason is the correct explanation of assertionB. If both assertion and reason are true but reason is not the correct explanation of assertionC. If assertion is true but reason is falseD. If both assertion and reason are false

Answer» Correct Answer - A
The columnar epithelium is composed of a single layer of tall and slender cells. Their nuclei are located at the base. Free surface may have microvilli. They are found in the lining of stomach and intestine and help in secretion and absorption.
478.

Metamorphosis in frog can be accelerated byA. `l_(2)`B. PC. KD. Ca

Answer» Correct Answer - A
479.

The kidney of frog areA. holonephrosB. mesonephrosC. metanephrosD. pronephros

Answer» Correct Answer - B
480.

Fat body of cockroach hasA. TrophocytesB. MycetocytesC. OenocytesD. all of these

Answer» Correct Answer - D
481.

In cockroach the corpora allata secreteA. brain hormoneB. growth hormoneC. juvenile hormoneD. ecdyson

Answer» Correct Answer - C
482.

An insect which undergoes complete metamorphosis is calledA. AmetabolaB. HemimetabolaC. HolometabolaD. None of these

Answer» Correct Answer - C
483.

Open blood vascular system without hemoglobin or any other respiratory pigment is found inA. CockroachB. FathwormC. HydraD. Nereis

Answer» Correct Answer - A
484.

If corpora allata are removed from the first instar of a nymph, thenA. It will remain nymph foreverB. It will enter into the secondary stage of juvenileC. It will become adult immediatelyD. None

Answer» Correct Answer - C
485.

Brown colour of Earthworm is due toA. MelaninB. PorphyninC. HaemoglobinD. both (1) and (2)

Answer» Correct Answer - B
486.

Innominate isA. a nerveB. an arteryC. a veinD. a part of skeleton and an artery

Answer» Correct Answer - D
487.

In Earthworm, testes occur in segmentsA. 11 and 12B. 12 and 13C. 14 and 15D. 10 and 11

Answer» Correct Answer - D
488.

Which of the following is not an anticoagulant?A. HistamineB. HirudinC. HeparinD. Citrate

Answer» Correct Answer - A
489.

Which of the acts as middle man ?A. W.B.C.B. PlasmaC. BloodD. Lymph.

Answer» Correct Answer - D
490.

In man , the number of R.B.C. per cubic mm of blood isA. 1 to 3 millionsB. 5 to 5.4 millionsC. Less than one milliion but more than 50 thousandD. Less than 50 thousand.

Answer» Correct Answer - B
491.

In man , the number of R.B.C. per cubic mm of blood isA. 4 millionB. 5 millionC. 6 millionD. `0*5` million.

Answer» Correct Answer - B
492.

Goblet cells areA. Unicellular glandsB. Multicellular glandsC. Stratified epitheliumD. Dead keratinised cells.

Answer» Correct Answer - A
493.

Protein present in cartilage isA. OsseinB. ChondrinC. MyosinD. Elastin

Answer» Correct Answer - B
494.

The protein which occurs in the matrix of bone isA. OsseinB. ChondrinC. KeratinD. Globulin

Answer» Correct Answer - A
495.

coelom in earthworm isA. schizocoelomB. enterocoelomC. both (1) and (2)D. pseudocoelom

Answer» Correct Answer - A
496.

Which of the following , does not help in clotting of blood ?A. HeparinB. ProthrombinC. `Ca^(2+)`D. Exposure to `O_2 `

Answer» Correct Answer - A
497.

ABO blood group system is give by `:`A. LandsteinerB. WallaceC. de VriesD. Lamarck

Answer» Correct Answer - A
498.

In mature RBC, nucleus is present inA. FrogB. RabbitC. Both 1 and 2D. Neither in frog nor in rabbit

Answer» Correct Answer - A
499.

During the process of blood coagulation, vitamin K helps inA. Formation of thromboplastinB. Formation of prothrombinC. Conversion of prothrombin to thrombinD. Conversion offibrinogen to fibrin

Answer» Correct Answer - B
500.

Fenestra ovalid in frog is theA. the opening in the auditory capsule which seperates the middle ear from the inner earB. the air filled cavity of the middle airC. the communication between the pharynx and the tympanic cavityD. the external opening of the tympanic cavity which is covered by the tympanic membrane

Answer» Correct Answer - A