24277 + Interview Questions in Biology in Class 12 Page 422 InterviewSolution

21051.	Question :Assertion. Protostele is the simplest steleReason. Dictyostele is th most advanced type of stele
Answer» Point out if both are true with REASON being CORRECT explanation both are true but reason is not correct explanation assertion true but reason is WRONG both are wrong ANSWER :C

Discussion

21052.	Question :Assertion: Protoplast culture is an important technique of genetic engineering. Reason: This technique results in the production of genetically modified crops.
Answer» If both Assertion and REASON are true and the Reason is the CORRECT EXPLANATION of the Assertion. If both Assertion and Reason are true and the Reason is not the Reason is not the correct explanation of the assertion If assertion is true but the Reason are false If both Assertion and Reason are false Answer :D

Discussion

21053.	Question : Assertion : Proline and chaperonins are widespread in plants of cold regions . Reason : Proline and chaperonins prevent freezing .
Answer» If both A and R are true and R is the correct EXPLANATION of A . If both A and R are true but R is not the correct explanation of A . If A is true but R is false . If both A and R are are false . ANSWER :D

Discussion

21054.	Question : Assertion: Protandry is a condition in which anthers mature earlier than stigma. Reason: Cleistogamous flowers are bisexual and never open.
Answer» If both Assertion and REASON are true and Reason is corret EXPLANATION of Assertion If both Assertion and Reason are true and Reason is not corret explanation of Assertion If Assertion is true but Reason is false If both Assertion and Reason are false Answer :B

Discussion

21055.	Question : Assertion :- Progressive degeneration of skeletal muscle mostly due to genetic disorder. is muscular dystrophy. Reason:- Rapid spasms in muscle due to low Ca^ ++ in body fluid, is tetany.
Answer» If both ASSERTION and reason are true and reason is the correct explanation of assertion If both assertion and reason are true but reason is not the correct explanation of assertion. If assertion is true but reason is FALSE. If both assertion and reason are false. ANSWER :B

Discussion

21056.	Question : Assertion :- Progressive degeneration of sekeletal muscle mostly due to genetic disorder, is muscular dystrophy. Reason :- Rapid spasms in muscle due to low Ca^(++) in body fluid, is tetany.
Answer» If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion . If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion If Assertion is True but the Reason is FALSE. If both Assertion & Reason are false. ANSWER :2

Discussion

21057.	Question : Assertion: Progeny of pure line is heterozygous.Reason: Pure lines are not the progeny of homozygous organisms.
Answer» If both ASSERTION and REASON are TRUE and the Reason is the CORRECT EXPLANATION of the Assertion. If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion. If Assertion is true but the Reason is false. If both Assertion and Reason are false. Answer :D

Discussion

21058.	Question : Assertion: Primitive atmosphere was of reducing type. Reason: First hydrogen atoms combined with all oxygen.
Answer» SOLUTION :The interstellar dust from which EARTH originated was especially rich in hydrogen. It readily combined with NITROGEN forming AMMONIA. With carbon forming methane. And with oxygen forming water oxygen forming water leaving no free oxygen. Thus. Early atmosphere of PRIMITIVE earth was strongly reducing. It contained hydrogen, methane ammonia and water vapours.

Discussion

21059.	Question : Assertion: Primary atmosphere of primitive earth was reducing Reason: Primary atmosphere had abundance of CH_4 , NH_3 and CO_2 but had no free O_2
Answer» If both ASSERTION and Reason are true and the Reason is the correct EXPLANATION of the Assertion If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion. If Assertion is true but the Reason is FALSE. If both Assertion and Reason are false. Answer :A

Discussion

21060.	Question : Assertion: Poultry farms should be kept lighted at night. Reason: Poultry birds are afraid of predators at night.
Answer» If both ASSERTION and Reason are TRUE and the Reason is the correct EXPLANATION of the Assertion. If both Assertion and Reason are true and the Reason is not the Reason is not the correct explanation of the assertion If assertion is true but the Reason are false If both Assertion and Reason are false Answer :C

Discussion

21061.	Question : Assertion : Predators maintain species diversity. Reason : Predators reduce the intensity of competition among competing prey species.
Answer» SOLUTION :Predation is an interaction between members of TWO species in which members of one species capture, kill and EAT up members of other species. The former are CALLED predators while the latter are spoken as PREYS. Predators also help in maintaining species diversity in a community, by reducing the intensity of competition among competing prey species.

Discussion

21062.	Question : Assertion : Predaton is an interspecific interaction with a feeding strtegy.
Answer» Both Assertion and REASON are ture and Reason is the CORRECT explanation of Assertion Both Assertion and Reason are ture but Reasonis not the correct explanation of Assertion Assertion is ture but Reason is false both Assertion and Reason are false Answer :B

Discussion

21063.	Question : Assertion: Poultry farming helps in raising the nutritional standards. Reason: Poultry supplies both meat and egg which has more nutrients.
Answer» If both ASSERTION and Reason are TRUE and the Reason is the correct EXPLANATION of the Assertion. If both Assertion and Reason are true and the Reason is not the Reason is not the correct explanation of the assertion If assertion is true but the Reason are false If both Assertion and Reason are false Answer :A

Discussion

21064.	Question : Assertion : Potential natality is never realized. Reason : Biotic potential is countered by environment resistance.
Answer» If both ASSERTION and REASON are true and Reason is a correct EXPLANATION of Assertion. If both Assertion and Reason are true and Reason is not a correct explanation of Assertion. If Assertion is true but Reason is FALSE If both Assertion and Reason are false. Answer :A

Discussion

21065.	Question : Assertion : Potential natality is never realized. Reason: Biotic potential is resisted by environmental resistance
Answer» If both Assertion cord Reason are TRUE and Reason is CORRECT explanation of Assertion If both Assertion and Reason are true but Reason is not correct explanation of Assertion If Assertion is true but Reason is false. If both Assertion and RENSON are false. Answer :A

Discussion

21066.	Question : Assertion :- Potassium plays an important role in opening and closing of stomata. Reason:- In cells K can be found in free form and regulate osmotic potential of cell.
Answer» If both ASSERTION and REASON are TRUE and reason is the CORRECT EXPLANATION of assertion. If both assertion and reason are true but reason is not the correct explanation of assertion. If assertion is true but reason is false. If both assertion and reason are false. Answer :A

Discussion

21067.	Question : Assertion: Natality potential is never realised. Reason: Biotic potential is countered by environmental resistance
Answer» (a) If both Assertion and REASON are TRUE and the Reason is the correct EXPLANATION of the Assertion. (b) If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion. (C) If Assertion is true but the Reason is false (d) If both Assertion and Reason are false. Solution :If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

Discussion

21068.	Question : Assertion : Polyploidy helps in rapid speciation. Reason : Interspecific sterile hybrids become fertile due to doubling of chromosome number leading to normal pairing of chromosomes and normal meiosis.
Answer» If both ASSERTION and REASON are true and Reason is a correct EXPLANATION of Assertion If both Assertion and Reason are true but Reason is not a correct explanation of Assertion. If Assertion is true but Reason is false If both Assertion and Reason are false Solution :If both Assertion and Reason are true and Reason is a correct explanation of Assertion

Discussion

21069.	Question : Assertion : Polymer modified bitumen is emerging as one of the important construction material. Reason: Plastic waste, otherwise considered to be a pollution meanace, can find its use in polymer modified bitumen construction and thus help in solving the pollution problem.If both .A. and .R. are true and .R. is the correct explanation of .A..If both .A. and .R. are true and .R. is not the correct explanation of .A...A. is true but .R. is false.Both .A. and .R. are false.
Answer» If both .A. and .R. are TRUE and .R. is the correct EXPLANATION of .A.. If both .A. and .R. are true and .R. is not the correct explanation of .A.. .A. is true but .R. is false. Both .A. and .R. are false. Answer :A

Discussion

21070.	Question : Assertion : Polycistronic mRNA, found in prokaryotes, specify a number of polypeptides. Reason : Monocistronic mRNA, found in eukaryotes, specify only a single polypeptide.
Answer» If both assertion and REASON are TRUE and reason is the CORRECT explanation of assertion If both assertion and reason are true butreason is NOTTHE correct explanation of assertion If assertion is true but reason is false if both assertion and reason are false. Answer :b

Discussion

21071.	Question :Assertion: Polyhedrovirus is called a baculovirus.Reason: Nucleopolyhedrovirus is employed to control Bacillus bacteria.
Answer» If both Assertion and REASON are TRUE and the Reason is the CORRECT explanation of the Assertion If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion. If Assertion is true but the Reason is false. If both Assertion and Reason are false. Answer :C

Discussion

21072.	Question : Assertion. Plasmids are being widely used as vehicle DNA. Reason. They can be easily isolated and introduced viral genome.
Answer» If both ASSERTION and REASON are true and the Reason is a correct EXPLANATION of the Assertion . If both Assertion and Reason are true but Reason is not a correct EXPLANATIONS of the Assertion If Assertion is true but the Reason is false . If both Assertion and Reason are false. Answer :A

Discussion

21073.	Question : Assertion : Plasma membrane is exceedingly thin and not visible as a separate layer. Reason :It appears merely as a surface layer of cytoplasm.
Answer» If both A and R are true and R is the correct explanation of A. If both A and R are true but R is not the correct explanation of A. If A is true but R is FALSE A is false but R is true. Solution :All cells are bounded by a thin membrance called the plasmalemma . This membrane is not seen under LIGHT microscope as SEPARATE layer. It has no cell cement and thus it very thin. It has structural proteins , ENZYMES and carrier proteins.

Discussion

21074.	Question : Assertion : Plants have wider range of distribution which are distributed by spores. Reason: Spores are easily dissiminated by water.
Answer» If both ASSERTION and REASON are true and Reason is CORRET explanation of Assertion If both Assertion and Reason are true and Reason is not corret explanation of Assertion If Assertion is true but Reason is false If both Assertion and Reason are false Answer :D

Discussion

21075.	Question : Assertion : Plant-animal interactions do not generaly involve co-evolution of the mutualist organisms. Reason : Evolution of the plants and animals can never go side by side.
Answer» Solution :Plant-animal interactions often INVOLVE co-evolution of the mutualists, that is, the evolution of the flower and its POLLINATOR species are closely linked with one another. This is because plants need the help of animals for POLLINATING their flowers and dispersing their seeds. Animals GET rewards in the form of pollen and nectar for POLLINATORS and juicy and nutritious fruits for seed dispersal.

Discussion

21076.	Question : Assertion : Plantibodies are animal antibodies produced in plants Reason : Plantibodies are just a theoretical concept
Answer» If both assertion and reason are true and reason is the correct EXPLANATION of assertion If both assertion and reason are true but reason is not the correct explanation of assertion If assertion is true but reason is false If both assertion and reason are false Solution :The term 'plantibody' is derived from fusion of plant and antibody. Plantibodies are produced by transgenic plants that EXPRES the ANIMAL antibody genes transferred into them. So, far only slgA (secretary lgA) has been produced in the plant SYSTEMS, Plantibodies have TWO application (i) treatments of human and animals diseases and (ii) protection of plants from nematodes and viruses.

Discussion

21077.	Question : Assertion : Phytoplankton, algae & higher plants are chief producers in pond ecosystem. Reason : Many algae are responsible for production of ethanol.
Answer» Both A and R are true and R is the CORRECT EXPLANATION of A. Both A and R are true but R is not correct explanation of A A is true but R is false A and R are false Answer :B

Discussion

21078.	Question : Assertion : Pills are very effective contraceptives with few side effects Reason : Pills inhibit ovulation and implanation as well as retard entry of sperms.
Answer» If both ASSERTION and REASON are true and reason is the correct explanation of assertion If both assertion and reason are true but reason is not the correct explanation of assertion If assertion is true but reason is false If both assertion and reason are false Answer :A

Discussion

21079.	Question : Assertion : Photochemical smog is mainly composed of nitrogen oxides, volatile organic compounds, ozone and peroxyacyl nitrates. Reason : Photochemical smog develops in cold weather conditions by the interaction of secondary pollutants.
Answer» (a) Both, Assertion and Reason, are true and Reason is the correct explanation of Assertion (b) Both, Assertion and Reason, are true but Reason is not the correct explanation of Assertion (c) If Assertion is true but Reason is false (d) If Assertion is false but Reason is true Solution :Photochemical smog is a condition that develops when primary pollutants (such as oxides of nitrogen and volatile ORGANIC compounds) interact under the influence of SUNLIGHT to PRODUCE a MIXTURE of secondary pollutants. Thus photochemical smog is mainly composed of oxides of nitrogen volatile organic compounds (primary pollutants), ozone and peroxyacl nitrate, PAN (secondary pollutants).

Discussion

21080.	Question : Assertion : Phenylpyruvic acid is excreted through urine in case of phenylketonuria Reason : The affected individual lacks enzyme phenylalanine hydroxylase.
Answer» Both A and R are correct and R is correct explanation of A Both A and R are correct but R is not the correct explanation of A A is correct but R is incorrect Both A and R are incorrect Solution :Phenylketonuria is an inherited error of metabolism caused by a deficiency in the ENZYME phenylalanine hydroylase it is an autosomal recessive trait. It is a hereditary human condition resulting from the inability to convert phenylalanine into tyrosine. This leads to phenylpyruvic acid and other derivatives. These are then excreted in urine due to POOR absorption by KIDNEYS.

Discussion

21081.	Question : Assertion: Phhylloclades are adaptation for xerophytic habitats. Reason: Ruscus, Casuarina have reduced or modified leaves to avoid transpiration.
Answer» If both ASSERTION and Reason are true and the Reason is the correct explanation of the assertion. If both assertion and Reason are true but the reason is not the correct explanation of the assertion If assertion is true but reason is false If both assertion and reason are false. Solution :Phylloclades LIKE rusus and CASUARINA have fleshy stem and spiny LEAVES which are adaptations for xerophytic habitat.

Discussion

21082.	Question : Assertion: Perennials live for many years Reason: Their life cycle do not end with seed production.
Answer» If both ASSERTION and REASON are true and the Reason is the correct explanation of the assertion. If both assertion and Reason are true but the reason is not the correct explanation of the assertion If assertion is true but reason is false If both assertion and reason are false. Solution :The LIFE CYCLE of ORGANISM generally end with the end of reproduction.

Discussion

21083.	Question :Assertion : Partially transverse waves are possible on a liquid surface. Reason : Surface tension provide some rigidity on a liquid surface.
Answer» If both ASSERTION & REASON are True & the Reason is a CORRECT explanation of the Assertion. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion. If Assertion is True but the Reason is False. If both Assertion & Reason are False. Answer :A

Discussion

21084.	Question : Assertion :- Parbhanikranti is one of the improved variety of bhindi from high yield and disease resistance point of view. Reason :- It was obtained by mutation in high yielding variety.
Answer» If both Assertion & Reason are TRUE & Reason is a CORRECT EXPLANATION of the Assertion. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion. If Assertion is True but the Reason is False. If both Assertion & Reason are false. Solution :N//A

Discussion

21085.	Question : Assertion :- Parbhanikranti is one of the improved variety of bhindi from high yield and disease resistance point of view. Reason :- It was obtained by mutation in high yielding variety
Answer» If both ASSERTION and reason are TRUE and reason is the CORRECT EXPLANATION of assertion. If both assertion and reason are true but reason is not the correct explanation of assertion. If assertion is true but reason is false. If both assertion and reason are false. Answer :C

Discussion

21086.	Question : Assertion:- Papilionatae is sub family of Asteraceae. Reason :- Papilionatae is also called as sunflower family.
Answer» If both Assertion & REASON are TRUE & the Reason is a correct EXPLANATION of the Assertion. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion. If Assertion is True but the Reason is False If both Assertion & Reason are false Answer :D

Discussion

21087.	Question : Assertion : Ozone layer absorbs UV radiations emitting from sunlight and prevents it from reaching the earth. Reason: Due to continuous addition of Cl^(-) in the atmosphere, ozone is depleted.(A) both A and R are true and R is the correct explanation of A(B) both A and R are true and R is not the correct explanation of A(C)A is true but R is false(D) Both A and R are false
Answer» both .A. and .R. are true and .R. is the correct EXPLANATION of .A: both .A. and .R. are true and .R. is not the correct explanation of .A.. .A. is true but .R. is FALSE. Both .A. and .R. are false. Answer :B

Discussion

21088.	Question : Assertion : Parbhani kranti is transgenic variety of Abelmoschus esculentus Reason : Mutation breeding is useful for improving new varieties
Answer» Without FERTILISATION DIPLOID EMBRYO forms With fertilisation diploid embryo forms Without fertilisation HAPLOID embryo cell form embryo With fertilisation haploid embryo cell form embryo Answer :B

Discussion

21089.	Question : Assertion Ovules after fertilisation develops into a fruit. Reason The angiospermic fruits contain diploid endosperm.
Answer» If both Assertion and REASON are TRUE and Reason is corret EXPLANATION of Assertion If both Assertion and Reason are true and Reason is not corret explanation of Assertion If Assertion is true but Reason is false If both Assertion and Reason are false Answer :D

Discussion

21090.	Question : Assertion: Overexposure to sun tans the skin in human beings.Reason: In epidermal cells, melanin appears and saves the skin from UV rays of the suna) If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.b) If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion.c) If Assertion is true but the Reason is false.d) If both Assertion and Reason are false.
Answer» If both ASSERTION and REASON are TRUE and the Reason is the CORRECT EXPLANATION of the Assertion. If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion. If Assertion is true but the Reason is false. If both Assertion and Reason are false. Answer :A

Discussion

21091.	Question : Assertion: Overpopulation causes a number of socio-economic problems Reason: A number of bacterial and viral diseases have been controlled
Answer» If both Assertion CORD Reason are TRUE and Reason is correct EXPLANATION of Assertion If both Assertion and Reason are true but Reason is not correct explanation of Assertion If Assertion is true but Reason is false. If both Assertion and RENSON are false. Answer :B

Discussion

21092.	Question : Assertion: Overdose of cocaine should be avoided. Reason: Its overdose causes cardiovascular and respiratory failure.
Answer» If both ASSERTION and Reason are TRUE and the Reason is the CORRECT EXPLANATION of the Assertion. If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion. If Assertion is true but the Reason is false. If both Assertion and Reason are false. ANSWER :A

Discussion

21093.	Question : Assertion: Outermost layer of the bone is a fibrous connective tissue. Reason: Matrix of bone is composed of protein ossein.
Answer» If both assertion and Reason are true and the Reason is the correct explanation of the assertion. If both assertion and Reason are true but the reason is not the correct explanation of the assertion If assertion is true but reason is false If both assertion and reason are false. Solution :The OUTERMOST COVERING LAYER of bone is CALLED periosteum.

Discussion

21094.	Question : Assertion :- Origin of virus like structure is an example of retrogressive evolution. Reason : "Descent with modificaltion" is a fundamental concept of evolution.
Answer» If both ASSERTION & REASON are True & the Reason is a CORRECT EXPLANATION of the Assertion. If both Assertion & Reason are True but Reason is a not a correct explanation of the Assertion. If Assertion is True but the Reason is False. If both Assertion & Reason are false. Answer :B

Discussion

21095.	Question : Assertion: Ostrich has vestigial wings and feather but is a cursorial animal. Reason: Ostrich disused the wings for defence.
Answer» If both ASSERTION and REASON are true and the Reason is the correct explanation of the Assertion If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion. If Assertion is true but the Reason is FALSE. If both Assertion and Reason are false. Answer :A

Discussion

21096.	Question :Assertion :-Ontogenically tracheids are unicellular and vessels are multicellular. Reason :-Tracheids are made up of single cell while vessel is made up of several vessel elements.
Answer» If both ASSERTION & REASON are True & the Reason is a correct explanation of the Assertion. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion. If Assertion is True but the Reason is FALSE If both Assertion & Reason are false. Answer :A

Discussion

21097.	Question : Assertion : Organisations like GEAC are necessary to monitor GM researches and to test the safety of introducing GM organisms for public services Reason : GM researches can have unpredictable results which even can be disastrous when genetically modified organisms are introduced into the ecosystem.
Answer» If both ASSERTION and REASON are true and reason is the CORRECT EXPLANATION of assertion If both assertion and reason are true but reason is not the correct explanation of assertion If assertion is true but reason is false If both assertion and reason are false Answer :A

Discussion

21098.	Question : Assertion: Only Lactobacillus lactis causes curdling of milk.Reason: Only this bacteria can produce lactic acid.
Answer» If both ASSERTION and REASON are TRUE and the Reason is the CORRECT EXPLANATION of the Assertion If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion. If Assertion is true but the Reason is false. If both Assertion and Reason are false. Answer :D

Discussion

21099.	Question : Assertion: One of the major crops that originated in the new world is wheat. Reason: Wheat is cultivated on large scale in Central Asia
Answer» (a) If both ASSERTION and Reason are true and the Reason is the correct explanation of the Assertion. (B) If both Assertion and Reason are true and the Reason is not the Reason is not the correct explanation of the assertion (c) If assertion is true but the Reason are FALSE (d) If both Assertion and Reason are false Answer :D

Discussion

21100.	Question : Assertion: One in every six persons in the world is an Indian. Reason: In India, there are more females than males.
Answer» If both ASSERTION and Reason are TRUE and the Reason is the correct EXPLANATION of the Assertion. If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion. If Assertion is true but the Reason is false If both Assertion and Reason are false. Solution :If Assertion is true but the Reason is false

Discussion

Explore topic-wise InterviewSolutions in .

Question :Assertion. Protostele is the simplest steleReason. Dictyostele is th most advanced type of stele

Question :Assertion: Protoplast culture is an important technique of genetic engineering. Reason: This technique results in the production of genetically modified crops.

Question : Assertion : Proline and chaperonins are widespread in plants of cold regions . Reason : Proline and chaperonins prevent freezing .

Question : Assertion: Protandry is a condition in which anthers mature earlier than stigma. Reason: Cleistogamous flowers are bisexual and never open.

Question : Assertion :- Progressive degeneration of skeletal muscle mostly due to genetic disorder. is muscular dystrophy. Reason:- Rapid spasms in muscle due to low Ca^ ++ in body fluid, is tetany.

Question : Assertion :- Progressive degeneration of sekeletal muscle mostly due to genetic disorder, is muscular dystrophy. Reason :- Rapid spasms in muscle due to low Ca^(++) in body fluid, is tetany.

Question : Assertion: Progeny of pure line is heterozygous.Reason: Pure lines are not the progeny of homozygous organisms.

Question : Assertion: Primitive atmosphere was of reducing type. Reason: First hydrogen atoms combined with all oxygen.

Question : Assertion: Primary atmosphere of primitive earth was reducing Reason: Primary atmosphere had abundance of CH_4 , NH_3 and CO_2 but had no free O_2

Question : Assertion: Poultry farms should be kept lighted at night. Reason: Poultry birds are afraid of predators at night.

Question : Assertion : Predators maintain species diversity. Reason : Predators reduce the intensity of competition among competing prey species.

Question : Assertion : Predaton is an interspecific interaction with a feeding strtegy.

Question : Assertion: Poultry farming helps in raising the nutritional standards. Reason: Poultry supplies both meat and egg which has more nutrients.

Question : Assertion : Potential natality is never realized. Reason : Biotic potential is countered by environment resistance.

Question : Assertion : Potential natality is never realized. Reason: Biotic potential is resisted by environmental resistance

Question : Assertion :- Potassium plays an important role in opening and closing of stomata. Reason:- In cells K can be found in free form and regulate osmotic potential of cell.

Question : Assertion: Natality potential is never realised. Reason: Biotic potential is countered by environmental resistance

Question : Assertion : Polyploidy helps in rapid speciation. Reason : Interspecific sterile hybrids become fertile due to doubling of chromosome number leading to normal pairing of chromosomes and normal meiosis.

Question : Assertion : Polycistronic mRNA, found in prokaryotes, specify a number of polypeptides. Reason : Monocistronic mRNA, found in eukaryotes, specify only a single polypeptide.

Question :Assertion: Polyhedrovirus is called a baculovirus.Reason: Nucleopolyhedrovirus is employed to control Bacillus bacteria.

Question : Assertion. Plasmids are being widely used as vehicle DNA. Reason. They can be easily isolated and introduced viral genome.

Question : Assertion : Plasma membrane is exceedingly thin and not visible as a separate layer. Reason :It appears merely as a surface layer of cytoplasm.

Question : Assertion : Plants have wider range of distribution which are distributed by spores. Reason: Spores are easily dissiminated by water.

Question : Assertion : Plant-animal interactions do not generaly involve co-evolution of the mutualist organisms. Reason : Evolution of the plants and animals can never go side by side.

Question : Assertion : Plantibodies are animal antibodies produced in plants Reason : Plantibodies are just a theoretical concept

Question : Assertion : Phytoplankton, algae & higher plants are chief producers in pond ecosystem. Reason : Many algae are responsible for production of ethanol.

Question : Assertion : Pills are very effective contraceptives with few side effects Reason : Pills inhibit ovulation and implanation as well as retard entry of sperms.

Question : Assertion : Photochemical smog is mainly composed of nitrogen oxides, volatile organic compounds, ozone and peroxyacyl nitrates. Reason : Photochemical smog develops in cold weather conditions by the interaction of secondary pollutants.

Question : Assertion : Phenylpyruvic acid is excreted through urine in case of phenylketonuria Reason : The affected individual lacks enzyme phenylalanine hydroxylase.

Question : Assertion: Phhylloclades are adaptation for xerophytic habitats. Reason: Ruscus, Casuarina have reduced or modified leaves to avoid transpiration.

Question : Assertion: Perennials live for many years Reason: Their life cycle do not end with seed production.

Question :Assertion : Partially transverse waves are possible on a liquid surface. Reason : Surface tension provide some rigidity on a liquid surface.

Question : Assertion :- Parbhanikranti is one of the improved variety of bhindi from high yield and disease resistance point of view. Reason :- It was obtained by mutation in high yielding variety.

Question : Assertion :- Parbhanikranti is one of the improved variety of bhindi from high yield and disease resistance point of view. Reason :- It was obtained by mutation in high yielding variety

Question : Assertion:- Papilionatae is sub family of Asteraceae. Reason :- Papilionatae is also called as sunflower family.

Question : Assertion : Parbhani kranti is transgenic variety of Abelmoschus esculentus Reason : Mutation breeding is useful for improving new varieties

Question : Assertion Ovules after fertilisation develops into a fruit. Reason The angiospermic fruits contain diploid endosperm.

Question : Assertion: Overpopulation causes a number of socio-economic problems Reason: A number of bacterial and viral diseases have been controlled

Question : Assertion: Overdose of cocaine should be avoided. Reason: Its overdose causes cardiovascular and respiratory failure.

Question : Assertion: Outermost layer of the bone is a fibrous connective tissue. Reason: Matrix of bone is composed of protein ossein.

Question : Assertion :- Origin of virus like structure is an example of retrogressive evolution. Reason : "Descent with modificaltion" is a fundamental concept of evolution.

Question : Assertion: Ostrich has vestigial wings and feather but is a cursorial animal. Reason: Ostrich disused the wings for defence.

Question :Assertion :-Ontogenically tracheids are unicellular and vessels are multicellular. Reason :-Tracheids are made up of single cell while vessel is made up of several vessel elements.

Question : Assertion: Only Lactobacillus lactis causes curdling of milk.Reason: Only this bacteria can produce lactic acid.

Question : Assertion: One of the major crops that originated in the new world is wheat. Reason: Wheat is cultivated on large scale in Central Asia

Question : Assertion: One in every six persons in the world is an Indian. Reason: In India, there are more females than males.