24277 + Interview Questions in Biology in Class 12 Page 72 InterviewSolution

3551.	Question : Type of natural selection that leads to splitting of population in a species leading to formation of new species is
Answer» NORMALIZING selection Directional selcetion Disruptive selection Mass selection Answer :C

Discussion

3552.	Question : Type of natural selection that eliminates deleterious variants and keeps the species unchanged is
Answer» DIRECTIONAL selection Stabilising selection Disruptive selection Diversifying selection Answer :B

Discussion

3553.	Question : Type of mark made in the skin of a person bit by a leech.
Answer» SOLUTION :Triradi ATE or Y SHAPED.

Discussion

3554.	Question : Type of inheritance involved in kernal colour of wheat ……..
Answer» SOLUTION :Polygenic INHERITANCE

Discussion

3555.	Question : Type of inheritance in cytoplasmic male sterility in maize ………….
Answer» SOLUTION :MITOCHONDRIAL INHERITANCE

Discussion

3556.	Question : Type of gene interaction involved in inheritance of fruit colour in summer squash ………
Answer» SOLUTION :DOMINANT epistatis

Discussion

3557.	Question : Type of food is responsible for fertile queen and sterile worker bees. True and False ?
Answer» ANSWER :TRUE

Discussion

3558.	Question : …….type of Immunoglobulin is involed in allergic reactions
Answer» ANSWER :IGE

Discussion

3559.	Question : _______type of heterotrophic nutrition is seen in yeast.
Answer» ANSWER :ABSORPTIVE

Discussion

3560.	Question : Type of endosperm in coconut water ………….. .
Answer» SOLUTION :FREE NUCLEAR ENDOSPERM

Discussion

3561.	Question : Write about embryonic development in leech.
Answer» SOLUTION :DIRECT DEVELOPMENT.

Discussion

3562.	Question : what typeofcell division is seenin generativecellofpollen to form sperms.
Answer» BINARY fission MITOSIS meiosis fragmentation Solution :Mitosis

Discussion

3563.	Question : Type of digestion in Porifera and Coelenterata
Answer» ANSWER :B

Discussion

3564.	Question : Type of development of dicot embryo …………….. .
Answer» SOLUTION :onagrad or CRUCIFER TYPE

Discussion

3565.	Question : Tyloses are found in
Answer» SECONDARY phloem Secondary xylem Sclereids Sclerenchyma fibers Answer :B

Discussion

3566.	Question : Two yearsago,the lakewas pure ,cleanand richin varietyof organism while nowit iscolourless ,richin algaeand have a dirty smell .Namethe pollutantsand phenomenon .
Answer» SOLUTION :The POLLUTANTS arephosphaticand nitrogeneous inor-organicfertilisers .The phenomenonis calledeutrophi- CATION.

Discussion

3567.	Question : tylasoid is intrusion of a
Answer» STRUCTURE into parenchyma parenchyma into strutre other than tracheary ELEMENT. parenchyma into tracheary element ANNULAR INGROWTH into a CELL. Answer :b

Discussion

3568.	Question : Two types to aquatic organisms in a lake show specific growth patterns as shown below, in a brief period of time. The lake is adjacent to anagricultural land extensively with fertilisers. Answer the question based on the facts given above : (i) Name the organisms depicting the patterns A and B. (ii) State the reason for the growth pattern seen in A. (iii) Write the effects of the growth patterns seen above.
Answer» Solution :(i) A Dissolved Oxygen - ALGAE B Biochemical oxygen demend - fish/aquatic animal. (ii) Due to excessive loading nutrients of fertilizers from adjacent agriculture land resuting in increase in nutrients. (iii) DECREASE in dissolved, in increase in nutrients. (iii) Decrease in dissolved oxygen, increase in BOD, fish MORTALITY, unpleasant ODOUR of Eutrophication.

Discussion

3569.	Question : Two types of flowers are produced by
Answer» Viola Oxalis Commelina All of these Answer :4

Discussion

3570.	Question : Two very seriousinherentproblems related withnuclear energy .
Answer» SOLUTION :i. ACCIDENTAL LEAKAGE . II. SAFE disposalof radioactivewastes.

Discussion

3571.	Question : Two types of fusions, syngamy and triple fusion take place in embryo sac
Answer» Solution :During FERTILISATION, one male gamete out of two male gametes of pollen tubes move towards the egg cell and fuses with its nucleus thus completing the syngamy. This result in the formation of a diploid cell, the zygote (2n). The other male gamete moves towards the two polar nuclei located in the central cell and fuses with them to produce a triploid Primary Endosperm Nucleus (PEN). As this involves the fusion of three haploid nucles it is termed as triple fusion. Since two types of fusions, syngamy and triple fusion take PLACE in an embryo sac the PHENOMENON is termed double fertilisation an event UNIQUE to flowering plants.

Discussion

3572.	Question : Two statements are given consider them andchoose the correct option. Statement IFoot of moss sporophyte is a wellorganised structure. Statement II. In thecapsule of moss, trabaculae connect the hypodermis with thechlorenchymatous region.
Answer» Both the statements are TRUE Both the statements are false Statement I is true and II is false Statement II is true and I is false Solution :The TRABECULAE PRESENTIN MOSS capsule connects hypodermis with spore SAC.

Discussion

3573.	Question :Two strands of double helix model of DNA are held together by H-bonds between
Answer» NITROGEN bases Phosphoric acid Sugar and phosphate Nitrogen and sugar Answer :A

Discussion

3574.	Question : Two species which are morphologically almost identical but they do not interbreed. Such species are called
Answer» EVOLUTIONARY species sibling species polytypic species evolutionary trend Answer :B

Discussion

3575.	Question : Two species competing for the same resource can avoid competition by choosing different habits. This phenomenon is called
Answer» COMPETITIVE EXCLUSION Competitive FITNESS Survival of the FITTEST Resource partitioning Answer :D

Discussion

3576.	Question : Two species occupying same or overlapping area are called
Answer» SYMPATRIC ALLOPATRIC PARAPATRIC Ring SPECIES Answer :A

Discussion

3577.	Question : Two species cannot occupy the same niche. This law is known:
Answer» WIEN Law Gause Law Allen Law Competition EXCLUSION Principle Answer :B

Discussion

3578.	Question : Two scientists responsible for contributing in success of green revolution are :-
Answer» Connell and ROBERT May Norman E. BORLAUG and M.S. Swaminathan Alec JEFFREY and M.S. Swaminathan Norman E. Borlaug and M.S. Subbalakshmi Answer :B

Discussion

3579.	Question : Two polypeptide chains are joined by hydrogen bonds to produce
Answer» `ALPHA`-helix Tertiary STRUCTURE `BETA`-PLEATED SHEET All the above. Solution :N//A

Discussion

3580.	Question : Two population which are interconnected by dispersing individual known as
Answer» LOCAL population Metapopulation Sister population None Answer :B

Discussion

3581.	Question : Two petitioner fathers filed case against a lady claiming to be the father of her only daughter. How could this case be settled identifying the real biological father?
Answer» Solution :The DNA of the two petitioner father and the DAUGHTER is EXTRACTED from the NUCLEI of white blood CELLS. The DNA molecules are then used for obtaining DNA fingerprints. (DNA profiles). Now the DNA fingerprints are matched to identify the real father.

Discussion

3582.	Question :Two pea plants were subjected for cross pollination . Of the 183 plants produced in the next generation . 94 plants , were found to be tall and 89 plants were found to be dwarf.The genotypes of the two parental plants are likely to be :
Answer» TT and tt Tt and Tt Tt and tt TT and TT Answer :C

Discussion

3583.	Question : Two organisms occupying a particular geographical area (say desert) show similar adaptive strategies. Taking examples, describe the phenomenon.
Answer» Solution :One can say that it is the similar habitat that has resulted in selection of similar adaptive features in different groups of ORGANISMS but toward the same FUNCTION. Spins of Opuntia and cactus are modifications of LEAVES to prevent the loss of water in desert. Camels and Kangaroos shows similar adaptive strategies to conserve water. They expel HYPERTONIC urine and highly solidified feces as majority of water is reabsorbed in nephron and large intestine. This phenomenon in which animals of two different groups undergo similar adaptations for survival in the similar habitats is called as convergent evolution. Australian marsupials, a number of marsupials each is different from the other evolved from an ancestral stock. But WITHIN the Australian island continent. Placental mammals in Australia also exhibit adaptive radiation in evolving into varieties of such placental mammals each of which appears to be similar to corresponding marsupial. Mouse and Marsupial mouse.

Discussion

3584.	Question : Two parasitic species of plants producing many minute seeds in a fruit.
Answer» SOLUTION :OROBANCHE and STRIGA

Discussion

3585.	Question : Two organisms occupying a particular geographical area ( say desert ) show similar adaptive strategies. Taking examples, describe the phenomenon.
Answer» Solution :Every geographical area has some specific TYPE of environmental factors which influence all the organisms of that area e.g. DESERTS have dry, hot and xeric conditions and less availability of water so organisms found in the desert (e.g. camels and kangaroo rats) show similar adaptive strategies aimed towards conservation of water. Both expel highly hypertonic URINE and highly solid faeces as REABSORB lot of water in their nephrons of the kidneys and large intestine. This phenomenon in which animals of two different groups of animals undergo similar adaptations for survival in the similar habitats is called convergent evolution. Hint: Consult convergent evolution in mouse and marsupial mouse

Discussion

3586.	Question : Two organisms occupying a particular geographical are ( say desert ) show similar adaptive strategies. Taking examples, descrbe the phenomenon.
Answer» Solution :This phenomenon indicated in the question is convergent evolution where by organism, not closely related, evolve similar traits INDEPENDENTLY as a result of adaptation to similarenvironment. , e.g., (i) Streamlined shape of sharks and dolphins. The FORMER is a fish, while dolphin is amammal, but both of them depend on swiftmovement through the water, so a stremlined shape is essential. Thus, it is the similar HABITAT that resulted in selection of similar adaptive features in different groups of organisms, but toward the same function. (ii) Spines ( modified leaves ) and thorns ( modified stems ), both LOOK similar and provide protection to the plant, the plants to which they belong are DISTANTLY related.

Discussion

3587.	Question : Two offspring developed in the same uterus from fertilisation of two different ova are
Answer» Monozygotic twins Dizygotic twins FRATERNAL twins Both B and C. ANSWER :D

Discussion

3588.	Question : two opposite forces operate in the growth and to the ability to reproduce at a given rate. the force opposing it is called
Answer» CARRYING CAPACITY Fecundity biotic POTENTIAL ENVIRONMENTAL resistance Answer :D

Discussion

3589.	Question : Two opposite forces operate in the growth and development of every population. One of them relates to the ability to reproduce at a given rate. The force opposing it is called:
Answer» Morbidity Biotic potential Fecundity Environmental resistance Answer :D

Discussion

3590.	Question : Two nucleotides are linked through
Answer» GLYCOSIDIC linkage Phosphodiester linkage H-bond Peptide linkage Answer :B

Discussion

3591.	Question : Two micronuclei occur in
Answer» PARAMECIUM AURELIA Paramecium caudatum Paramecium multimicronucleatum Balantidium coli. Answer :A

Discussion

3592.	Question : Two microbes found to be very useful in genetic engineering are
Answer» Escherichia coli and Agrobacterium Vibrio cholerae and a TAILED bacteriophage Diplococus SP. and PSEUDOMONAS sp. Crown GALL bacterium and CAENORHABDITIS elegans Answer :A

Discussion

3593.	Question : Two microbes found to be very useful in genetic engineering are(A) crown gall bacterium and caenorhabditis elegans.(B) Escherichia coli and Agrobacterium tumefaciens(C) Vibrio cholerae and a tailed bacteriophage(D) Diplococcus sp. and Pseudomonas sp.
Answer» crown GALL BACTERIUM and CAENORHABDITIS elegans. Escherichia coli and Agrobacterium TUMEFACIENS Vibrio cholerae and a tailed bacteriophage Diplococcus sp. and PSEUDOMONAS sp. Solution :Escherichia coli and Agrobacterium tumefaciens

Discussion

3594.	Question : Two microbes found to be very useful in genetic engineering are:
Answer» Diplococcus SP. and PSEUDOMONAS sp. Crown gall hacterium and caenothabditis elegans Escherichia COLI and Agrobacterium tumerfaciens Vibrio cholerae and a tailed bacteriophage Answer :C

Discussion

3595.	Question : Two levels , A and B of different sizes but shown absolute increase in the unit time to given leaves A^1 and B^1Find out the absolute growth and relative growth rate of both the leaves.
Answer» `{:("Absolute Growth of ","Absolute Growth of B","Relative Growth Rate of A", "Relative Growth Rate of B"),(5mc^2,10cm^2,10%,50%):}` `{:("Absolute Growth of ","Absolute Growth of B","Relative Growth Rate of A","Relative Growth Rate of B"),(10mc^2,5cm^2,5%,10%):}` `{:("Absolute Growth of ","Absolute Growth of B","Relative Growth Rate of A","Relative Growth Rate of B"),(5mc^2,5cm^2,10%,100%):}` `{:("Absolute Growth of ","Absolute Growth of B","Relative Growth Rate of A","Relative Growth Rate of B"),(5mc^2,5cm^2,100%,10%):}` ANSWER :D

Discussion

3596.	Question : Two leaves A and B are increasing their surface area by 7 cm^2 in one day. Their initial size was A = 7cm^2 and B = 70 cm^2. Choose correct option w.r.t.their absolute growth and relative growth.
Answer» ABSOLUTE GROWTH RATE of A is EQUAL to absolute growth rate of B while relative growth rate of A Absolute growth rate of A is greater than absolute growth rate of B while relative growth rate of A is equal to relative growth rate of B Absolute growth rate of A is LESS than absolute growth rate of B while relative growth rate of A is less than relative growth rate of B Absolute growth rate of A is equal to absolute growth rate of B while relative growth rate of Answer :A

Discussion

3597.	Question : Two local population becomes sister population when :-
Answer» They have same species They have DIFFERENT species They LIVES in same HABITAT (2) and (3) both Answer :A

Discussion

3598.	Question : Two kingdom classification system used for a long time was inadequate, so a need was felt for including besides gross morphology, other characteristics also. What were these characters which resulted in formation of five kingdom classification system ? (a) Cell structure (b) Mode of nutrition (c) Reproduction Evolutionary relationship
Answer» a & b a, b & c a, c & d a, b, c & d Answer :D

Discussion

3599.	Question : Two importatn steps of aerobic respiration namely oxidative decarboxylation and oxidative phosphorylation occurs respectively in
Answer» CYTOPLASM and MITOCHONDRIAL CRISTAE Mitochondrial MATRIX and mitochondrial dristae Mitochondrial cristae and cytoplasm Mitochondrial matrix and cytoplasm Answer :B

Discussion

3600.	Question : Two heterozygous tall pea plants with purple flowers are crossed. The probability that one of their offspring will have white flowere is 1/4 . The probability that one of their offspring will be short is 1/4. what is the probability that one of their offspring will be short with white flowers?
Answer» ZERO 1/16 1/8 1/4 Answer :B

Discussion

Explore topic-wise InterviewSolutions in .

Question : Type of natural selection that leads to splitting of population in a species leading to formation of new species is

Question : Type of natural selection that eliminates deleterious variants and keeps the species unchanged is

Question : Type of mark made in the skin of a person bit by a leech.

Question : Type of inheritance involved in kernal colour of wheat ……..

Question : Type of inheritance in cytoplasmic male sterility in maize ………….

Question : Type of gene interaction involved in inheritance of fruit colour in summer squash ………

Question : Type of food is responsible for fertile queen and sterile worker bees. True and False ?

Question : …….type of Immunoglobulin is involed in allergic reactions

Question : _______type of heterotrophic nutrition is seen in yeast.

Question : Type of endosperm in coconut water ………….. .

Question : Write about embryonic development in leech.

Question : what typeofcell division is seenin generativecellofpollen to form sperms.

Question : Type of digestion in Porifera and Coelenterata

Question : Type of development of dicot embryo …………….. .

Question : Tyloses are found in

Question : Two yearsago,the lakewas pure ,cleanand richin varietyof organism while nowit iscolourless ,richin algaeand have a dirty smell .Namethe pollutantsand phenomenon .

Question : tylasoid is intrusion of a

Question : Two types of flowers are produced by

Question : Two very seriousinherentproblems related withnuclear energy .

Question : Two types of fusions, syngamy and triple fusion take place in embryo sac

Question : Two statements are given consider them andchoose the correct option. Statement IFoot of moss sporophyte is a wellorganised structure. Statement II. In thecapsule of moss, trabaculae connect the hypodermis with thechlorenchymatous region.

Question :Two strands of double helix model of DNA are held together by H-bonds between

Question : Two species which are morphologically almost identical but they do not interbreed. Such species are called

Question : Two species competing for the same resource can avoid competition by choosing different habits. This phenomenon is called

Question : Two species occupying same or overlapping area are called

Question : Two species cannot occupy the same niche. This law is known:

Question : Two scientists responsible for contributing in success of green revolution are :-

Question : Two polypeptide chains are joined by hydrogen bonds to produce

Question : Two population which are interconnected by dispersing individual known as

Question : Two petitioner fathers filed case against a lady claiming to be the father of her only daughter. How could this case be settled identifying the real biological father?

Question :Two pea plants were subjected for cross pollination . Of the 183 plants produced in the next generation . 94 plants , were found to be tall and 89 plants were found to be dwarf.The genotypes of the two parental plants are likely to be :

Question : Two organisms occupying a particular geographical area (say desert) show similar adaptive strategies. Taking examples, describe the phenomenon.

Question : Two parasitic species of plants producing many minute seeds in a fruit.

Question : Two organisms occupying a particular geographical area ( say desert ) show similar adaptive strategies. Taking examples, describe the phenomenon.

Question : Two organisms occupying a particular geographical are ( say desert ) show similar adaptive strategies. Taking examples, descrbe the phenomenon.

Question : Two offspring developed in the same uterus from fertilisation of two different ova are

Question : two opposite forces operate in the growth and to the ability to reproduce at a given rate. the force opposing it is called

Question : Two opposite forces operate in the growth and development of every population. One of them relates to the ability to reproduce at a given rate. The force opposing it is called:

Question : Two nucleotides are linked through

Question : Two micronuclei occur in

Question : Two microbes found to be very useful in genetic engineering are

Question : Two microbes found to be very useful in genetic engineering are(A) crown gall bacterium and caenorhabditis elegans.(B) Escherichia coli and Agrobacterium tumefaciens(C) Vibrio cholerae and a tailed bacteriophage(D) Diplococcus sp. and Pseudomonas sp.

Question : Two microbes found to be very useful in genetic engineering are:

Question : Two levels , A and B of different sizes but shown absolute increase in the unit time to given leaves A^1 and B^1Find out the absolute growth and relative growth rate of both the leaves.

Question : Two leaves A and B are increasing their surface area by 7 cm^2 in one day. Their initial size was A = 7cm^2 and B = 70 cm^2. Choose correct option w.r.t.their absolute growth and relative growth.

Question : Two local population becomes sister population when :-

Question : Two importatn steps of aerobic respiration namely oxidative decarboxylation and oxidative phosphorylation occurs respectively in