24277 + Interview Questions in Biology in Class 12 Page 164 InterviewSolution

8151.	Question : Solute potential is I. the effect of dissolve solute on water potential. II. The amount by which water potential is reduced. III. Always negative. IV. Equal to water potential
Answer» Only I Only IV I, II and III II and IV Answer :C

Discussion

8152.	Question : Soluble inorganic and organic nutrient material, hormones, antibodies, against diptheria, smallpox, scarlet fever, measles etc. can pass from the mother to the foetus, so we can say that placenta act as a –
Answer» ENDOCRINE gland Barrier Ultra filter All of above Answer :C

Discussion

8153.	Question : solid wastecan createa major problemsin metrocities .a) which is thebest wayfor the safedisposalof thesolid waste b) classifysolid waste into 3 groups , which is thealternativeremedyfor the useof plastic
Answer» Solution :a) Sanitary land fills b)the solid wastescan be categorisedinto 3 types . a)bio degradable b) Recyclable c) NON biodegradable .The biodegradablewaste materialcan be disposedin deeppitsfor naturalbreak down .Recyclingof materialis made easyby THESEPARATION DONE byrag pickers .Non biodegradable waste should reduced by usingeco friendlypackaging & naturalfibercarry bags .state governament can play important roleby applying lawsfor reducingthe use of plastics .

Discussion

8154.	Question : Solidifying agent used in plant tissue culture is
Answer» NICOTINIC ACID Cobaltous CHLORIDE EDTA Agar ANSWER :D

Discussion

8155.	Question : Solenocytes differ from flame cells in
Answer» ABSENCE of cilia Absence of CONNECTION with excretorycanals Presence of BLOOD VESSELS All the above . Answer :C

Discussion

8156.	Question : Solar energy used by green plants for photosynthesis is only ...........
Answer» 2-8% 2-10% 3-10% 2-9% ANSWER :B

Discussion

8157.	Question : Solar cnstant is __________ cal cm^(2)/mm.
Answer» 2 4 6 8 Answer :A

Discussion

8158.	Question : solanum is a group of related
Answer» GENERA species FAMILIES CLASSES Answer :B

Discussion

8159.	Question : Soil transported by air is called
Answer» Eolian Alluvial Aerial Residual ANSWER :A

Discussion

8160.	Question : Soil transported by air is
Answer» ALLUVIAL GLACIAL Colluvial EOLIAN ANSWER :D

Discussion

8161.	Question : Soil showing permanetly wilted plants has:
Answer» CAPILLARY WATER HYGROSCOPIC water Gravitational water Ground nut Answer :A

Discussion

8162.	Question : soil particles, particularly clay and organic matter in soil , contain negative charges and attract positively charged ions, such as:
Answer» `MG^(2+)` `CA^(2+)` K+ All of these Answer :D

Discussion

8163.	Question : Soil formation can be initiated by biological organisms. How?
Answer» SOLUTION :SOIL formation is initiated by the biological weathering process. Biological weathering takes PLACE when organisms like bacteria, fungi, lichens and PLANTS help in the breakdown of rocks through the production of ACIDS and certain chemical substances.

Discussion

8164.	Question : Soil best suited for growth is
Answer» CLAY LOAM Sandy GRAVEL ANSWER :B

Discussion

8165.	Question : Softening of mature ripefruitsis due to
Answer» dissolution of middlelamella degradationof PRIMARY wall DELIGNIFICATION removal of suberin deposits in the cell wall SOLUTION :Softeningof mature ripe fruitsis due todissolution ofmiddlelamella. Middle lamellaacts as a CEMENTING LAYER between two cells,there byprovidingrigiding to cells. Ethylene promotesmaturationand ripeningof fruits.

Discussion

8166.	Question : 'Soft spots' in the skull of a new-born infant are
Answer» Sutures Fontanels Foramina Facets Answer :B

Discussion

8167.	Question : Sodium ion concentration is maintained by the hormone ……….. .
Answer» aldosterone parathormone calcitonin thyroxine Answer :A

Discussion

8168.	Question : Social forestry is :
Answer» Planting tree on public places and COMMON land's Wood species are grown in combination with herbaceous crop Growing ornamental and FRUIT tree in URBAN areas Growing trees NEEDED for industries in SPECIFIC area Answer :A

Discussion

8169.	Question : SO_2 pollution affects:
Answer» chloroplast mitochondria ribosomes vacuole Answer :B

Discussion

8170.	Question : SNP stands for
Answer» SINGLE NUCLEOTIDE Polymorphism Single NUCLEOSIDE Polypeptide Single nucleotide Polymorphism Single nucleotide polymer Solution :ELECTROPHORESIS

Discussion

8171.	Question : Snapdragon shows incomplete dominance for flower colour. Work out the progeny from cross between plants with pink flowers and state their phenotype.
Answer» Solution :The GENOTYPE of PINK flowers due to incomplete dominance will be RR. Therefore phenotype of progeny from cross between pink flowers will be pure red (RR), pink (Rr) and pure white (rr) in the ratio of 1:2:1 RESPECTIVELY.

Discussion

8172.	Question : Snow blindness is caused by
Answer» UV-A UV-B UV-C all EXCEPT (2) ANSWER :B

Discussion

8173.	Question : Snakeschangetheirbodytemperaturewithchangesinexternaltemperature . Buthumanbeingsnot . Classifythe organsimaccordingto theabovecharacterand explain.
Answer» SOLUTION :ORGANISMTHAT changetheir bodytemperaturewithchanges in externaltemperature are calledconformers. Organismsthatmaintain a constantbodytemperatureare callede.g. HUMANBEINGS

Discussion

8174.	Question : Snakethat builds a nest is
Answer» MARINE and POISONOUS TERRESTRIAL and non-poisonoua Terrestrial and poisonous Fresh-water and non-poisonous. SOLUTION :N//A

Discussion

8175.	Question : Snakes are stenotherm. Why ?
Answer» Solution :Snakes are STENOTHERMS SICE they can tolerae only a NARROW RANGE of temperature fluctuation.

Discussion

8176.	Question : Snakes change their body temperature with change in external temperature, but human being do not. How are organismsclassified according to above character with explanation.
Answer» Solution :Organisms that MAINTAIN a constant body temperature are called regulators.e.g. Human BEINGS. Organisms that CHANGE their body temperature with change in EXTERNAL temperature are called conformers., e.g., snake.

Discussion

8177.	Question : Snails and fish undergo aestivation to avoid summer related problems of heat and
Answer» HYGROSCOPICITY Desiccation Efflorescence STARVATION ANSWER :B

Discussion

8178.	Question : Smoking is injurious to health'. This is the slogan seen in all cigarette packets. a. As said above "is smoking injurious to health? b. Name the toxic alkaloid seen in it. c. Give some consequences a smoker has to face in the future.
Answer» Solution :a. Yes, SMOKING is injurious to HEALTH. B. NICOTINE c. Refer Section 6.5 [Harmful effects of nicotine]

Discussion

8179.	Question : "Smoking and Tobacco chewing is injurious to health" - Comment on the statement.
Answer» SOLUTION :Tabacco is smoked,chewed and used as snuff.It increases the carbon monoxide content of BLOOD and reduces the concentration of haem bound oxygen,thus causing oxygen deficiency in the body.Tobacco CONTAINS nicotine,carbon monoxide and tars,which cause problems in the heart ,lung and nervous system.Adrenal glands are stimumlatemd by nicotine to release aderenaline and nor adernaline which increases blood PRESURE and heart BEAT.

Discussion

8180.	Question : Smoking is harmful as it produces polycyclic aromatic hydrocarbons that cause:
Answer» REDUCTION in OXYGEN transport Increase in BLOOD PRESSURE Cancer Retardation of foetus Answer :C

Discussion

8181.	Question : Smallest unit of cell wall is:
Answer» Microtubule Fibril Microfibril Micelle Answer :B

Discussion

8182.	Question : SMOG is derived from:
Answer» SMOKE FOG Both A and B Only A Solution : Both A and B

Discussion

8183.	Question : Smog is :
Answer» FIRE SMOKE and Fog Water and smoke Air and water Answer :B

Discussion

8184.	Question : Smell of urine is due to the
Answer» urochrome urinode urea melanin Answer :B

Discussion

8185.	Question : Smallest rotatory biomachine found in aerobes is
Answer» `F_(0)-F_(1)` particle COMPLEX - I Complex - II UQ ANSWER :A

Discussion

8186.	Question : Smallest protein produced by vertebrates naturally in response to viral attack
Answer» ANTITOXIN Antibiotics Antigens INTERFERONS SOLUTION :Interferons

Discussion

8187.	Question : Smallest monerans causing diseases in plants are___________.
Answer» ANSWER :MYCOPLASMA

Discussion

8188.	Question : Smaller extremities in warm-blooded animals of cold areas were proposed by:
Answer» Dollo Gloger Allen Bergman Answer :C

Discussion

8189.	Question : Small sized sessile, flower is
Answer» INCOMPLETE Floret IMPERFECT Translator Answer :B

Discussion

8190.	Question : Small swellings on the surface of the chromosome are called …….. .
Answer» centromeres chromomeres chromonemata telomeres Answer :B

Discussion

8191.	Question : Small populations are prone to change in allelic frequencies which decrease genetic variability, this is explained by:
Answer» Sewall-Wright EFFECT GENETIC LOAD Genetic FLOW Mutation Answer :A

Discussion

8192.	Question : Small neclear RNA is transcribed by
Answer» RNA POLYMERASE I RNA Polymerase III RNA Polymerase II Both (1) and (3) Answer :B

Discussion

8193.	Question : Small, floating or weakly swimming plants and animals in freshwater and marine ecosystem are termed:
Answer» Nekton Benthos Planktons Nektons Answer :C

Discussion

8194.	Question : Small fish sticks to bottom of shark to obtain food crumbs
Answer» ANTIBIOSIS Predation Commensalism PARASITISM ANSWER :C

Discussion

8195.	Question : Small fish gets stuck near the bottom of a shark and derive its nutrition from it. This kind of association is called as:
Answer» symbiosis commensalism predation parasitism Answer :B

Discussion

8196.	Question : Small fish get stuck near the bollom of a shark and derives its nutrition from it. This kind of association is called
Answer» ANTIBIOSIS Commensalism PREDATION Parasitism Answer :B

Discussion

8197.	Question : Small circulardepressionirregularily scattered on the underside of some lichens are called
Answer» cyphellae SOREDIA corticolous terricolous ANSWER :A

Discussion

8198.	Question : Smack. is a drug obtained from the
Answer» latex of Papaver somniferum leaves of Cannabis sativa flowers of Dhatura fruits of Erythroxylum coca Solution :SMACK. is a drug obtained from the latex of Papaver somniferum. Smack is brown sugar and commonly CALLED as, HEROIN. Heroin is obtained by acetylation of morphine. Leaves of Cannabis sativa yields bhang. Flower of DATURA has hallucinogenic properties. Fruits of Erythroxylum coca is USED to prepare cocaine.

Discussion

8199.	Question : Smallanimalsare rarelyfoundin polarregions.Comments
Answer» SOLUTION :Sincesmallanimalshavea largersufacearearelativeto theirvolumetheytendto losebodyheatveryfastwhen ITIS coldoutsideTheyhave toexpendmuchenergyto GENERATE BODY heatthroughmethabolism.so THEYARE rarelyfoundpolarregions.

Discussion

8200.	Question : Small amounts of P and S are carried as organic compounds
Answer» ANSWER :1

Discussion

Explore topic-wise InterviewSolutions in .

Question : Solute potential is I. the effect of dissolve solute on water potential. II. The amount by which water potential is reduced. III. Always negative. IV. Equal to water potential

Question : Soluble inorganic and organic nutrient material, hormones, antibodies, against diptheria, smallpox, scarlet fever, measles etc. can pass from the mother to the foetus, so we can say that placenta act as a –

Question : solid wastecan createa major problemsin metrocities .a) which is thebest wayfor the safedisposalof thesolid waste b) classifysolid waste into 3 groups , which is thealternativeremedyfor the useof plastic

Question : Solidifying agent used in plant tissue culture is

Question : Solenocytes differ from flame cells in

Question : Solar energy used by green plants for photosynthesis is only ...........

Question : Solar cnstant is __________ cal cm^(2)/mm.

Question : solanum is a group of related

Question : Soil transported by air is called

Question : Soil transported by air is

Question : Soil showing permanetly wilted plants has:

Question : soil particles, particularly clay and organic matter in soil , contain negative charges and attract positively charged ions, such as:

Question : Soil formation can be initiated by biological organisms. How?

Question : Soil best suited for growth is

Question : Softening of mature ripefruitsis due to

Question : 'Soft spots' in the skull of a new-born infant are

Question : Sodium ion concentration is maintained by the hormone ……….. .

Question : Social forestry is :

Question : SO_2 pollution affects:

Question : SNP stands for

Question : Snapdragon shows incomplete dominance for flower colour. Work out the progeny from cross between plants with pink flowers and state their phenotype.

Question : Snow blindness is caused by

Question : Snakeschangetheirbodytemperaturewithchangesinexternaltemperature . Buthumanbeingsnot . Classifythe organsimaccordingto theabovecharacterand explain.

Question : Snakethat builds a nest is

Question : Snakes are stenotherm. Why ?

Question : Snakes change their body temperature with change in external temperature, but human being do not. How are organismsclassified according to above character with explanation.

Question : Snails and fish undergo aestivation to avoid summer related problems of heat and

Question : Smoking is injurious to health'. This is the slogan seen in all cigarette packets. a. As said above "is smoking injurious to health? b. Name the toxic alkaloid seen in it. c. Give some consequences a smoker has to face in the future.

Question : "Smoking and Tobacco chewing is injurious to health" - Comment on the statement.

Question : Smoking is harmful as it produces polycyclic aromatic hydrocarbons that cause:

Question : Smallest unit of cell wall is:

Question : SMOG is derived from:

Question : Smog is :

Question : Smell of urine is due to the

Question : Smallest rotatory biomachine found in aerobes is

Question : Smallest protein produced by vertebrates naturally in response to viral attack

Question : Smallest monerans causing diseases in plants are___________.

Question : Smaller extremities in warm-blooded animals of cold areas were proposed by:

Question : Small sized sessile, flower is

Question : Small swellings on the surface of the chromosome are called …….. .

Question : Small populations are prone to change in allelic frequencies which decrease genetic variability, this is explained by:

Question : Small neclear RNA is transcribed by

Question : Small, floating or weakly swimming plants and animals in freshwater and marine ecosystem are termed:

Question : Small fish sticks to bottom of shark to obtain food crumbs

Question : Small fish gets stuck near the bottom of a shark and derive its nutrition from it. This kind of association is called as:

Question : Small fish get stuck near the bollom of a shark and derives its nutrition from it. This kind of association is called

Question : Small circulardepressionirregularily scattered on the underside of some lichens are called

Question : Smack. is a drug obtained from the

Question : Smallanimalsare rarelyfoundin polarregions.Comments

Question : Small amounts of P and S are carried as organic compounds