24277 + Interview Questions in Biology in Class 12 Page 455 InterviewSolution

22701.	Question : According to David Tilman greater the diversity greater is the primary productivity. Can you think of a very low diversity man-made ecosystem that has high productivity?
Answer» Solution :AGRICULTURAL FIELDS LIKE wheat FIELD / paddy field which are ALSO examples of monoculture practices.

Discussion

22702.	Question : A viral disease causing painful swelling of parotid gland is
Answer» Mumps Measles Chicken pox Rabbies Answer :A

Discussion

22703.	Question : According to Darwin, the organic evolution isdue to
Answer» INTRASPECIFIC COMPETITION interspecific competition competition within closely RELATED species REDUCED feeding efficiency in one species DUE to the presence of interfering species Solution : interspecific competition

Discussion

22704.	Question : A viraldisease against which vaccine is not available
Answer» Measles mumps poliomyelitis chicken pox Answer :D

Discussion

22705.	Question : According to Darwin, the organic evolution is due to
Answer» INTRASPECIFIC COMPETITION Interspecific competition Competition within closelyrelatedspecies Reduced feeding EFFICIENCY in one species DUE to the presence of interfering species. Solution :Reduced feeding efficiency in one species due to the presence of interfering species.

Discussion

22706.	Question : [A]: Vestigeal organs are those parts of the body which are greatly reduced and are use- less.[R]: These are the ruminants of once fully de- veloped organs which are gradually lost as these were no longer necessary
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 and R is false If both A and R are false Answer :A

Discussion

22707.	Question : A very efficient converter of solar energy with net productivity of 2-4kg/m^(2) or more is the crop of:-
Answer» wheat sugarcane rice bajra Solution :In `C_(4)`-plants, (e.g. maize, sugarcane, sorgum) OPTIMUM temperature of photosynthesis is `30-45^(@)C`. In `C_(4)`-plants, rate of net photosynthesis in FULL sunlight is (40-80 mg `CO_(2)//dm^(2)//HR`) which is more than the rate of net photosynthesis (15-35 mg `CO_(2)//dm^(2)//hr`) at optimum sunlight in `C_(3)`-plants.

Discussion

22708.	Question : Accordingto Darwin , the organic evolution is due to.
Answer» Intraspecific competition INTERSPECIFIC competition Competition within closelyrelated species REDUCED feeding efficiency in one speciesdue TOTHE presence of interfering species ANSWER :B

Discussion

22709.	Question : A versatile anther is an adaptation for ……….. Type of pollination.
Answer» anemophilous entomophilous hydrophilous ornithophilous Answer :A

Discussion

22710.	Question : According to Darwin, if new variations are to be inherited they should be:
Answer» Selected by the NATURE through COMPETITION and ADAPTION Arised through saltations Defeated in the STRUGGLE for existence Rejected by the nature Answer :A

Discussion

22711.	Question :A vein differs from an artery in having
Answer» NARROW lumen Strongly muscular wall Only OUTER elastic lamina Valves to CONTROL direction of flow of blood Answer :D

Discussion

22712.	Question : According to Darwin during the struggle for existence, these organisms alone will survive
Answer» Organisms with discontinuous variations Organisms with acquired variations Organisms with USELESS variations Organisms with BENEFICIAL variations ANSWER :D

Discussion

22713.	Question : [A]: Vectors carry only the foreign DNA/gene into the host cell. [R]: Plasmids can carry recombinant DNA but viruses can not.
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 and R is FALSE If both A and R are false Answer :D

Discussion

22714.	Question : According to classification of enzymes the four digit code number for enzyme hexokinase is :-
Answer» 7.2.1.1 3.7.2.1 4.2.1.7 2.7.1.1 Solution :Four DIGIT code of enzymes`IMPLIES` Hexokinase is the enzyme of `2^(nd)` class transferases so its code number STARTS with digit '2'.

Discussion

22715.	Question : A vector should ............. (i) contain suitable marker (ii) contain ori site (iii) have poly linkers (iv) be small in size
Answer» a) i , ii and III b) ii , iii and iv c) i , ii and iv d) All the above ANSWER :D

Discussion

22716.	Question : A vector derived from bacterial chromosome is called_____.
Answer» ANSWER :BACTERIAL ARTIFICIAL CHROMOSOME

Discussion

22717.	Question : According to Chargaff's rule, which one is correct ?
Answer» [A]+[T]=[G]+[C] [A]+[C]=[G]+[T] [A]+[G]=[T]+[C] BOTH(A) AND (B) ANSWER :C

Discussion

22718.	Question : A: Use of plastic waste in construction of flexible pavement is gaining important. R : Polymer modified bitumen shows better properties for road construction.
Answer» Both Assertion and Reason are TRUE and Reason is a correct EXPLANATION of the Assertion. Both Assertion and Reason are true but Reason is not a correct explanation of the Assertion. Assertion is true but Reason is false. Assertion is false but Reason is true. ANSWER :A

Discussion

22719.	Question :According to Central Pollution Control Board (CPCB), PM 2.5 refers to particulate matter having an average diameter of :-
Answer» `LE` 2.5 NM `le` 2.5 Å `le` 2.5 `MU`m `le` 2.5 mm Answer :C

Discussion

22720.	Question : [A]: Varied groups of plants and animals ei- ther related or unrelated provide an example of divergent evolution.[R]: The changes occur in a cumulative direc- tion and result in the origin of new popula- tions from the old ones
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 and R is false If both A and R are false Answer :A

Discussion

22721.	Question : According to cell theory
Answer» CELLS are FUNDAMENTAL STRUCTURAL units of organisms Cells reporduce Cells are LIVING Cell have nuclei Answer :A

Discussion

22722.	Question : A universal characteristic of insects is
Answer» TWO PAIR of wings Two pair of antennae Two pair of antennae Three PAIRS of THORACIC legs Answer :D

Discussion

22723.	Question : A vaccine meant for protection against tuberculosis is
Answer» BCG DPT TT BGC Solution :BCG

Discussion

22724.	Question : According to blue white screening method, recombinantsare identified on the basic of inactivation of
Answer» `BETA`-glactosidase `alpha`-galactosidase. Both (a) and (B) None of these ANSWER :d

Discussion

22725.	Question : A unit of land with a natural boundary having mosaic of patches and represent different ecosystems is
Answer» Biome Landscape Biosphere Community Answer :B

Discussion

22726.	Question : According to binomial nomenclature, which one is incorrect ?
Answer» TAUTONYMS SYNONYMS Autonyms Bionyms ANSWER :A

Discussion

22727.	Question : A unisexual flower having no androecium is called DithecousDioeciousMonoeciousPistillate
Answer» Dithecous Dioecious Monoecious Pistillate Answer :D

Discussion

22728.	Question : According to biological clock at what time human came into existence ?
Answer» 0.99930555555556 0.86805555555556 0.82638888888889 0.95763888888889 Solution :0.99930555555556

Discussion

22729.	Question : A unisexual flower having no androecium is called
Answer» Dithecous Dioecious Monoecious Pistillate Answer :D

Discussion

22730.	Question : A unique and defining features of cnidarians is_____.
Answer» ANSWER :A

Discussion

22731.	Question : According to Allen's Rule, the mammals from colder climates have
Answer» SHORTER EARS and longer limbs longer ears and shorter limbs longer ears and longer limbs shorter ears and shorter limbs Solution :According to Allen.s Rule the mammals from colder CLIMATES have shorter ears and shorter limbs. This type of adaptation helps these ANIMALS to minimize heat loss and maintain homoeostasis.

Discussion

22732.	Question : A typical flower with superior overy and other floral parts inferior is
Answer» POLYGAMOUS HYPOGYNOUS Perigynous Epigynous. Answer :B

Discussion

22733.	Question : According to Big-Bang theory universe is very old and its origin took place almost
Answer» 10 BILLION YEARS ago 20 billion years ago 30 billion years ago 40 billion years ago Answer :B

Discussion

22734.	Question : A typical nucleosome contains:
Answer» 100 BP of DNA Helix 200 bp of DNA Helix 300 bp of DNA Helix 400 bp of DNA Helix Answer :B

Discussion

22735.	Question : According to abiogenesis, life originated from
Answer» Non-living Pre-existing life Chemicals Extra-terrestrial matter Solution :Non-living

Discussion

22736.	Question :A typical eukaryotic cell consists of :-
Answer» CELL MEMBRANE Nucleus Cytoplasm All of the above ANSWER :C

Discussion

22737.	Question : A typical angiosperm embryo sac, at maturity, though…….. Is………..
Answer» 6 NUCLEATE - 7 celled 7 nucleate - 8 celled 8 nucleate - 7 celled 7 nucleate - 6 celled Answer :C

Discussion

22738.	Question : According to A.G. Tansley, what is an ecosystem?
Answer» Solution :A.G. Tansley (1935), who DEFINED ecosystem as .the SYSTEM resulting from the integration of all the living and non-living FACTORS of the environment..

Discussion

22739.	Question : A typical angiosperm embryo sac at maturity is
Answer» 4 - NUCLEATE - 2 - celled 8 - nucleate - 7 - celled 4 - nucleate - 4 - celled 8 - nucleate - 2 - celled Answer :B

Discussion

22740.	Question : According to 2001 census, Indian population was:
Answer» 684 MILLIONS 844 millions 1027 millions 1128 millions Answer :C

Discussion

22741.	Question : A typical angiosperm embryo sac at maturity is.
Answer» 7 NUCLEATE 8 celled 8 nucleate 8 celled 7 nucleate 7 celled 8 nucleate 7 celled Answer :D

Discussion

22742.	Question : Acclimatization is
Answer» Introduction Pure-line BREEDING Pure-line SELECTION ADAPTATION to new environment Solution :Adaptation to new environment

Discussion

22743.	Question : A typical angiosperm embryo sac at maturity is :
Answer» 4 NUCLEATE-2 celled 8 nucleate-7 celled 4 nucleate - 4celled 8 nucleate - 4 celled Answer :B

Discussion

22744.	Question : Accommodation of eye is due to
Answer» CILIARY MUSCLES iris muscles AQUEOUS fluid Vitreous fluid Answer :A

Discussion

22745.	Question : A typeical female gametophyte of angiosperms contains_____number of nuclei.
Answer» ANSWER :EIGHT

Discussion

22746.	Question : Accessory whorls and Essential Whorls
Answer» SOLUTION :

Discussion

22747.	Question : A type of vegetative propagation where the lower branches of the plant are bent down and covered with soil is called_____.
Answer» ANSWER :GROUND LAYERING

Discussion

22748.	Question : A type of placentation in which an axis is formed in the centre of ovary and ovary become multichambered –
Answer» FREE central Marginal Axile Parietal Answer :C

Discussion

22749.	Question : Accessory sex character is
Answer» Beard Breast Moustaches All the above. ANSWER :B

Discussion

22750.	Question : A type of inflorescence in which oldest flowers are present at upper portion and young buds are arranged towards base–
Answer» Cymose Umbel Racemose Corymb Answer :A

Discussion

Explore topic-wise InterviewSolutions in .

Question : According to David Tilman greater the diversity greater is the primary productivity. Can you think of a very low diversity man-made ecosystem that has high productivity?

Question : A viral disease causing painful swelling of parotid gland is

Question : According to Darwin, the organic evolution isdue to

Question : A viraldisease against which vaccine is not available

Question : According to Darwin, the organic evolution is due to

Question : [A]: Vestigeal organs are those parts of the body which are greatly reduced and are use- less.[R]: These are the ruminants of once fully de- veloped organs which are gradually lost as these were no longer necessary

Question : A very efficient converter of solar energy with net productivity of 2-4kg/m^(2) or more is the crop of:-

Question : Accordingto Darwin , the organic evolution is due to.

Question : A versatile anther is an adaptation for ……….. Type of pollination.

Question : According to Darwin, if new variations are to be inherited they should be:

Question :A vein differs from an artery in having

Question : According to Darwin during the struggle for existence, these organisms alone will survive

Question : [A]: Vectors carry only the foreign DNA/gene into the host cell. [R]: Plasmids can carry recombinant DNA but viruses can not.

Question : According to classification of enzymes the four digit code number for enzyme hexokinase is :-

Question : A vector should ............. (i) contain suitable marker (ii) contain ori site (iii) have poly linkers (iv) be small in size

Question : A vector derived from bacterial chromosome is called_____.

Question : According to Chargaff's rule, which one is correct ?

Question : A: Use of plastic waste in construction of flexible pavement is gaining important. R : Polymer modified bitumen shows better properties for road construction.

Question :According to Central Pollution Control Board (CPCB), PM 2.5 refers to particulate matter having an average diameter of :-

Question : [A]: Varied groups of plants and animals ei- ther related or unrelated provide an example of divergent evolution.[R]: The changes occur in a cumulative direc- tion and result in the origin of new popula- tions from the old ones

Question : According to cell theory

Question : A universal characteristic of insects is

Question : A vaccine meant for protection against tuberculosis is

Question : According to blue white screening method, recombinantsare identified on the basic of inactivation of

Question : A unit of land with a natural boundary having mosaic of patches and represent different ecosystems is

Question : According to binomial nomenclature, which one is incorrect ?

Question : A unisexual flower having no androecium is called DithecousDioeciousMonoeciousPistillate

Question : According to biological clock at what time human came into existence ?

Question : A unisexual flower having no androecium is called

Question : A unique and defining features of cnidarians is_____.

Question : According to Allen's Rule, the mammals from colder climates have

Question : A typical flower with superior overy and other floral parts inferior is

Question : According to Big-Bang theory universe is very old and its origin took place almost

Question : A typical nucleosome contains:

Question : According to abiogenesis, life originated from

Question :A typical eukaryotic cell consists of :-

Question : A typical angiosperm embryo sac, at maturity, though…….. Is………..

Question : According to A.G. Tansley, what is an ecosystem?

Question : A typical angiosperm embryo sac at maturity is

Question : According to 2001 census, Indian population was:

Question : A typical angiosperm embryo sac at maturity is.

Question : Acclimatization is

Question : A typical angiosperm embryo sac at maturity is :

Question : Accommodation of eye is due to

Question : A typeical female gametophyte of angiosperms contains_____number of nuclei.

Question : Accessory whorls and Essential Whorls

Question : A type of vegetative propagation where the lower branches of the plant are bent down and covered with soil is called_____.

Question : A type of placentation in which an axis is formed in the centre of ovary and ovary become multichambered –

Question : Accessory sex character is

Question : A type of inflorescence in which oldest flowers are present at upper portion and young buds are arranged towards base–