24277 + Interview Questions in Biology in Class 12 Page 350 InterviewSolution

17451.	Question : Double endosperm is found in
Answer» WHEAT RICE PEA COCONUT ANSWER :D

Discussion

17452.	Question : Dou you think that reproductive health in our country has improved in the past 50 years ? If yes, mention some such areas of improvement.
Answer» Solution :Yes. Some such areas of improvement are the following. i. Made awareness among the people about reproduction related ASPECT through audio visual and printed MEDIA by governmental as well as nongovernmental agencies. ii. Motivated smaller families by using VARIOUS contraceptive methods. iii. INCENTIVES given to couples with small families. iv. Specialised health care units (infertility clinic etc.) could help the couples suffering from infertility through assisted REPRODUCTIVE technologies (ART).

Discussion

17453.	Question : Double bonds are present in which fatty acids?
Answer» ANSWER :UNSATURATED

Discussion

17454.	Question : Dosa and Idli are preparations of
Answer» WHEAT flour Rice Rice and BLACK Gram Wheat and Black Gram Answer :C

Discussion

17455.	Question : Dorsal view of human brain .
Answer» SOLUTION :

Discussion

17456.	Question : Dormancy in seeds may be due to presence of certain chemicals like
Answer» PHENOLIC acid Zeatin NAA Amylase Answer :A

Discussion

17457.	Question : Dormancy in positive photoblastic seeds can be broken by exposing them to:
Answer» VIOLET light Blue light Far RED light Red light Answer :D

Discussion

17458.	Question : DOPA stands for .................... .
Answer» 3, 4 - DIHYDROXY PHENYL acetate 3, 4 - dihydroxy phenyl alanine 3, 4 - dihydroxy phenyl asparate 3, 4 - dihydroxy phenyl aldehyde Answer :B

Discussion

17459.	Question : Dominant stage in bryophyta is
Answer» sporophytic gametophytic both (a) and (B) NONE of these Answer :B

Discussion

17460.	Question : Dominant mutations are easier to detect than recessive mutations because they
Answer» Are always LETHAL and so their appearance is UNMISTAKABLE Are EXPRESSED in both HOMOZYGOTES and heteroxygotes Occur at a higher FREQUENCY are always neutral in their effect Answer :B

Discussion

17461.	Question : Dominant species represents most abundant
Answer» FIRST tree Shrub that appears for the first time Herb that BINDS the soil and provides organic MATTER to it Species having major EFFECT on PHYSICAL environment Answer :C

Discussion

17462.	Question : Dominant flora 2.5 billion years ago was
Answer» GREEN ALGAE Blue-Green algae Red algae BROWN algae Answer :B

Discussion

17463.	Question : Dominant phase of bryophytes bear
Answer» MULTICELLULAR SEX organs Unicellular sex organs Spore MOTHER cells Capsules Answer :A

Discussion

17464.	Question : Dominance is not an autonomous feature of a gene in case more than one phenotype is influence by the same gene.
Answer» ANSWER :TRUE

Discussion

17465.	Question : Domestic waste constitutes
Answer» NONBIODEGRADABLE pollution biodegradable pollution Effluents Air pollution Answer :B

Discussion

17466.	Question : Dolly, the sheep was obtained by a technique known as
Answer» CLONING by gene transfer Cloning without the HELP of gametes Cloning by TISSUE culture of somatic cells Cloning by nuclear transfer SOLUTION : Cloning by nuclear transfer

Discussion

17467.	Question : Domain_____contains membrane bound nucleus(p1-nuclei)in their cells
Answer» ANSWER :EUKARYA

Discussion

17468.	Question : Dolphins belong to class________.
Answer» ANSWER :MAMMALIA,

Discussion

17469.	Question : Dog fish belongs to phylum_______.
Answer» ANSWER :CHORDATA,

Discussion

17470.	Question : Does self-incompatibility impose any restrictions on autogamy? Give reasons and suggest the method of pollination in such plants.
Answer» Solution :Self-incompatibility imposes restrictions on autogamy. The season far this MAY be as Majority of flowering plants produce hermaphrodite flowers and when pollens grains comes in contact with the stigma of the same flower to CONTINUE self-pollination. Such type of continued self-pollination RESULT in inbreeding depression . That's why floweriug plants have developed MANY devices to discourage self-pollination and to encourage crose-pollination. One of the major way to prevent self-pollination is self-sterility . Self-sterility in some bisexual flowers if the pollen grains fall on the STIGME of the same flower, germination does not occur . But the same pollen grains germinate when they fall on the stigma of other flowers of the same species. It is a genetic mechanism to prevent self pollination.

Discussion

17471.	Question : Does self incompatibility impose any restrictions on autogamy ? Give reason and suggest the method of pollination in such plants
Answer» Solution :Self incompatibility impose limitation of self fertilisation. For this majority of flowering PLANTS produce bisexual flowers and while pollen grain comes in contact with stigma of pistil of sme flower and CONTINUES self pollination. In breeding results in depression due to CONTINUATION of self pollination of this type. So many remedies have been developed to PREVENT self pollination and encourage cross pollination. Self sterility is the bigger remedy to prevent self fertilisation Self sterility is seen in some bisexual flowers. If transfer of pollen grain occurs on the stigma of the same flower then germination does not TAKE place. If pollen transfers on the stigma of another flower of the same species then it germinates. These genetic devices is for preventing self pollination.

Discussion

17472.	Question : Does our blood have proteases and nucleases?
Answer» SOLUTION :Yes. They HELP in the FORMATION of BLOOD clot.

Discussion

17473.	Question : Does our blood have proteases and nucleases ?
Answer» SOLUTION :No our BLOOD does not have PROTEASE and NUCLEASE.

Discussion

17474.	Question : Does nature produce pollutants? Cite two examples.
Answer» SOLUTION :Yes, volcanic EMISSION, NATURAL decay.

Discussion

17475.	Question : Does light factor affect the distribution of organisms ? Write a brief note giving suitable examples of either plants or animals.
Answer» Solution :• Since plants produce food through photosynthesis, a process which is only possible when sunlight is available as a source of energy, • We can quickly understand the importance of light for living organisms, particularly autotrophs. • Many species of small plants (herbs and shrubs) growing in forests are adapted to photosynthesise optimally under very low light conditions because they are CONSTANTLY overshadowed by TALL, canopied trees. • Many plants are also DEPENDENT on sunlight to meet their photoperiodic requirement for FLOWERING. • For many animals too, light is IMPORTANT in that they use the diurnal and seasonal variations in light intensity and duration (photoperiod) ascues for timing their foraging, reproductive and migratory activities.

Discussion

17476.	Question : Does environment determines the sex of plant ? Explain in brief with an example.
Answer» SOLUTION :Yes, the EQUISETUM (horstail plant) , which GROW under good conditions develop as female plants those grown under stressed condition DEVELOPS as male then supporting the fact environment can also determines the sex of plant in few species.

Discussion

17477.	Question : Doesapicuture offermultiple advantages to farmers ?Listadvantagesif itis located neara placeofcommercialflower cultvation ..
Answer» Solution :Yes , apicultureoffersmanyadvantages tofarmerssuchas (i)HONEY producedbyhoneybeesis afood of highnutritivevalue . (ii)ITIS usedin theindigenoussystemofmedicine . (III)Honeybeesalsopeoucessbeeswax, whichis usedin theprepartionofcosmetiesandpolishesofvariouskinds . Ifapicultureisdoneneara placeofcommercialflowercultvationof offersseveraladvantagesBeesare thepollinationsof manycropspecies suchassunflower, BRASSICA , Appleand pear .Keepingbeehivesin cropfields duringfloweringperiod (i)increasess pollinationefficiency (ii)Improvesthe YIELD whichis beneficialboththepointofviewof cropyield andhoney yield.

Discussion

17478.	Question : Does apiculture offer multiple advantages to farmers ? List its advantages if it is located near a place of commercial flower Cultivation.
Answer» Solution :Bee-keeping or apiculture is the maintenance of hives of honeybees to produce honey, it has been an age-old cottage industry. Honey is a food of high nutritive value and find its use in the indigenous systems of medicine. Honeybee also produces beeswax, which finds many uses in industry, such as in the preparation of cosmetics and POLISHES of VARIOUS kinds. The increased demand of honey has led to large-scale beekeeping PRACTICES, it has become an established income generating industry, whether PRACTICED on a small or on a large scale. Bees are the pollinators of many of our crop species such as sunflower, Brassica, apple and PEAR. Keeping beehives in crop fields during flowering period increases pollination efficiency and improves the yield-beneficial both from the point of view of crop yield and honey yield.

Discussion

17479.	Question : Dodo became extinct due to :
Answer» GLOBAL ENVIRONMENTAL change Over exploitation Invasion of non-native species Pollution Answer :B

Discussion

17480.	Question : Dodo is a extinct bird without ability to fly is of which country
Answer» Moreshius Laxydip Canada Iceland SOLUTION :Moreshius

Discussion

17481.	Question : Does apiculture offer multiple advantages to farmers? List its advantages if it is located near a place of commercial flower cultivation.
Answer» Solution :(i) Advantage of apiculture: (ii) Advantages if LOCATED NEAR FLOWER cultivation:

Discussion

17482.	Question : Documented microfossils have been found that are as old as
Answer» `2.5` BILLION YEARS `3.5` billion years `1.5` billion years `2.5` MILLION years Answer :B

Discussion

17483.	Question : Doctor advises breast feeding to mothers for infants.
Answer» Solution :After parturition, MILK starts getting PRODUCED from mammary glands of females / mothers. The first milk that comes out of the mammary glands of the mother, immediately after the child BIRTH is CALLED colostrum that possesses antibody. It is necessaryfor healthy development for child. So doctor advises breast FEEDING to mothers for infants.

Discussion

17484.	Question : Do you think that the alternate splicing of exons may enable a structural gene to code for several isoproteins from one and the same gene? If yes, how? If not, why so?
Answer» Solution :Functional mRNA of STRUCTURAL genes need not always include all of it sexons. This alternate splicing of exons is sex-specific, tissue-specific, and even DEVELOPMENTAL stage-specific. By such alternate splicing of exons, a single gene may encode for several isoproteins and/or proteins of similar class. In absence of such a kind of splicing, there should HAVEBEEN new genes for EVERY protein/isoprotein. Such an extravagancy has been avoided in natural PHENOMENA by way of alternate splicing

Discussion

17485.	Question : Do you think that the alternate splicing of exons may enable a structural gene to code for several isoproteins from one and the same gene ? If yes, how ? If not, why so ?
Answer» Solution :Functional mRN A of STRUCTURAL genes need not always include all of its exons. This alternate splicing of exons is sex-specific, tissue-specific and even developmental stage-specific. By such alternate splicing of exons, a single GENE MAY encode for several ISOPROTEINS and/or proteins of similar class. In absence of such a kind of splicing, there should have been NEW genes for every protein/isoprotein. Such an extravagancy has been avoided in natural phenomena by way of alternative splicing.

Discussion

17486.	Question : Do you think that reproductive health in our country has improved in the past 50 years ? If yes, mention some such areas of improvement.
Answer» Solution : Yes, family planning and reproductive child health (RCH) PROGRAMME have been STARTED successfully. Now COMPARATIVELY more people have come to KNOW about advantages of small family and accepting the principles of "two children enough". In this improved sectors, mainly child vaccination, increasing use of contraceptives, family planning are included.

Discussion

17487.	Question : Do you think that reproductive health in our countryhas improved in the past 50 years?
Answer» Solution : If yes, mentionsome such areas of improvement. Ans. In our COUNTRY, the reproductive health of the personshas improved in the past 50 YEARS as evident in the following areas: (i) Birth rate is decreasing rapidly due to acceptingof family planning measures by more and more people. Birth rate was 36 per 1000 persons in 1981,30.5 per 1000 in 1991 and only 22.2 per 1000 in 2011. (ii) Due to better health care, the average life span ofIndians has increased from 50 years in 1970-71 to 60.4 years during 1988-95 and then to 69.89 yearsin 2011. (iii) Due to control of SEVERAL bacterial and viral diseaseswith the help of more and more effective antibiotics, medicines and surgical methods, there is rapid decline in death rate from 13.8 per 1000 in 1981,8 per 1000 in 2001 and 6.4 per 1000 in 2011. (iv) Due to sincere implementation of Reproductiveand Child Health Care (RCH) programmes, both maternal mortality rate (MMR) and INFANT mortality rate (IMR) have greatly reduced.

Discussion

17488.	Question : Do you thinkthat fungi can help the plant to grow and develop resistance ? If yes how ?
Answer» SOLUTION :YES, FUNGI form symbiotic ASSOCIATION with plants. This association absorbs phosphorus from the soil and passes it to the plant.

Discussion

17489.	Question : Do you think that friends can influence one to take alcohol/drugs? If yes, how may one protect himself/herself from such an influence ?
Answer» Solution :Yes, a FRIEND can influence one to take alcohol/ drugs. Steps to AVOID influence of drugs/alcohol are : Avoiding company of FRIENDS who takes drugs or alcohols. Seeking help from PARENTS, teachers and friends. Proper knowledge and awareness about alcohol and drug abuse . Not experimenting with drugs and increasing the will power to beat the curiosity. Taking IMMEDIATE medical help and counseling, if required .

Discussion

17490.	Question : Do you think taht friends can influence one to take alcohol/drugs? if yes how may one protect himself/herself from such an influence?
Answer» SOLUTION :Yes , Friebds can influence a PERSON to TAKE alcohol/drug. ONE can protect himself/herself by avoiding peer pleasure and experimental USE of alcohol/drug for curlosity or pleasure.

Discussion

17491.	Question : Do you think that friends can influence one to take alcohol/drugs? If yes, how may one protect himself/herself from such an influence?
Answer» SOLUTION :Education about the harmful effect of alcohol, counselling and seeking immediate PROFESSIONAL and MEDICAL help would totally relieve the INDIVIDUAL from the evil of taking alcohol.

Discussion

17492.	Question : Do you think parthenocarpy and apomixis are different process. Justify ?
Answer» Solution :The formation fruit from the OVARY WITHOUT the act of fertilization is called parthenocarpy. A method of reproduction which does not involve UNION of male female gemetes is called apomixis. Thus apomixis and parthenocarpy are asexual modes of reproduction. (i) But Apomixis refers to formation of seeds without fertillization. Whereas parthenocarpy refers to formation of fruits without fertilization. In Apomixis, the MEGASPORE mother cell does not indergo mieosis or cell from the nucellus develops into the embryo. In parthenocary, the ovary becomes a fruit without fertilization and thus fruits are SEEDLESS. Thus Apomixis and parthenocarpy are different processes.

Discussion

17493.	Question : Do you think Mendel.s laws of inheritance would have been different in the characters that he choose were located on the same chromosome ?
Answer» Solution :MENDEL WOULD not have DISCOVERED the laws of inheritance if hechose characters that were LOCATED on the same chromosome

Discussion

17494.	Question :Do you think microbes can also be used as a source of energy? If yes, how?
Answer» Solution : Microbes decompose and ferment organic matter and FORM biogas and alcohol respectively which are good sources of ENERGY. In this way, they can be USED as INDIRECT source of energy.

Discussion

17495.	Question : Do you think microbes can also be used as source of energy? If yes, how ?
Answer» SOLUTION : MICROBES are present in activated sludge. In which its anaerobic digestion takes place. There Biogas is FORMED. This biogas is USEFUL as a SOURCE of energy.

Discussion

17496.	Question : Do you see the prospects of viroids being used as plants vectors in near future?
Answer» Solution :Viroids are SMALLEST and simplest pathogenic agents comparising of 300-400 bases long, circular, SINGLE standed, naked RNA. They are MECHANICALLY transferable and INFECT other parts of the PLANTS. They have capability of being used as plant vectors.

Discussion

17497.	Question :Do you justify the statutory ban on amniocentesis in our country ? Give reasons.
Answer» Solution :Yes, it is necessary to put ban on Amniocentesis because currently MISUSE of amniocentesis is done which is used to determine the sex of foetus which leads to abortion in case of female foetus. They became so serious that sex ratio of male and female is disrupted. That shows negative approach in society. The real usage of this test is to CHECK genetic disability or metabolic deficiencies of foetus, or DNA of chromosome. In such cases if they are CURABLE, a decision of abortion can be taken.

Discussion

17498.	Question : Do you consider passive smoking is more dangerous than active smoking ? Why?
Answer» Solution :Yes, PASSIVE smoking is ALSO dangerous. In passive smoking the tobacco smoke PRODUCED by the active smoker is inhaled by the non smoker. It is more dangerous than the active smoking as the active smoking because the PERSON inhales only 10% of the smoke while 90% of it is inhaled by passive smoker.

Discussion

17499.	Question : Do you consider passive smoking is more dangerous than active smoking? Why?
Answer» Solution :Passive smoking is more dangerous because they MAY inhale more tobacco smoke than the actual smokers. They are threatened to develop cardiovascular and respiratory DISEASES and cancers. The nonsmokers have INCREASED risk of lung and breast cancer, asthma, heart diseases, congenetive impairment and dementia. This may lead to sudden infant death syndrome (SIDS), lung infections and bronchitis or EVEN TUBERCULOSIS in children.

Discussion

17500.	Question : Do you agree with the statement that microbes are omnipresent?
Answer» Solution :Yes, They LIVE in all parts of biosphere LIKE water, soil, HOT springs, ocean , floor, high in ATMOSPHERE, deep INSIDE the rocks in earth.s crust. Methanopyrus kandleri is a species that can live in `122^@C` temperature. Trichosporonoides nigerescens is a microbes which can survive for almost a decade without exposure to water.

Discussion

Explore topic-wise InterviewSolutions in .

Question : Double endosperm is found in

Question : Dou you think that reproductive health in our country has improved in the past 50 years ? If yes, mention some such areas of improvement.

Question : Double bonds are present in which fatty acids?

Question : Dosa and Idli are preparations of

Question : Dorsal view of human brain .

Question : Dormancy in seeds may be due to presence of certain chemicals like

Question : Dormancy in positive photoblastic seeds can be broken by exposing them to:

Question : DOPA stands for .................... .

Question : Dominant stage in bryophyta is

Question : Dominant mutations are easier to detect than recessive mutations because they

Question : Dominant species represents most abundant

Question : Dominant flora 2.5 billion years ago was

Question : Dominant phase of bryophytes bear

Question : Dominance is not an autonomous feature of a gene in case more than one phenotype is influence by the same gene.

Question : Domestic waste constitutes

Question : Dolly, the sheep was obtained by a technique known as

Question : Domain_____contains membrane bound nucleus(p1-nuclei)in their cells

Question : Dolphins belong to class________.

Question : Dog fish belongs to phylum_______.

Question : Does self-incompatibility impose any restrictions on autogamy? Give reasons and suggest the method of pollination in such plants.

Question : Does self incompatibility impose any restrictions on autogamy ? Give reason and suggest the method of pollination in such plants

Question : Does our blood have proteases and nucleases?

Question : Does our blood have proteases and nucleases ?

Question : Does nature produce pollutants? Cite two examples.

Question : Does light factor affect the distribution of organisms ? Write a brief note giving suitable examples of either plants or animals.

Question : Does environment determines the sex of plant ? Explain in brief with an example.

Question : Doesapicuture offermultiple advantages to farmers ?Listadvantagesif itis located neara placeofcommercialflower cultvation ..

Question : Does apiculture offer multiple advantages to farmers ? List its advantages if it is located near a place of commercial flower Cultivation.

Question : Dodo became extinct due to :

Question : Dodo is a extinct bird without ability to fly is of which country

Question : Does apiculture offer multiple advantages to farmers? List its advantages if it is located near a place of commercial flower cultivation.

Question : Documented microfossils have been found that are as old as

Question : Doctor advises breast feeding to mothers for infants.

Question : Do you think that the alternate splicing of exons may enable a structural gene to code for several isoproteins from one and the same gene? If yes, how? If not, why so?

Question : Do you think that the alternate splicing of exons may enable a structural gene to code for several isoproteins from one and the same gene ? If yes, how ? If not, why so ?

Question : Do you think that reproductive health in our country has improved in the past 50 years ? If yes, mention some such areas of improvement.

Question : Do you think that reproductive health in our countryhas improved in the past 50 years?

Question : Do you thinkthat fungi can help the plant to grow and develop resistance ? If yes how ?

Question : Do you think that friends can influence one to take alcohol/drugs? If yes, how may one protect himself/herself from such an influence ?

Question : Do you think taht friends can influence one to take alcohol/drugs? if yes how may one protect himself/herself from such an influence?

Question : Do you think that friends can influence one to take alcohol/drugs? If yes, how may one protect himself/herself from such an influence?

Question : Do you think parthenocarpy and apomixis are different process. Justify ?

Question : Do you think Mendel.s laws of inheritance would have been different in the characters that he choose were located on the same chromosome ?

Question :Do you think microbes can also be used as a source of energy? If yes, how?

Question : Do you think microbes can also be used as source of energy? If yes, how ?

Question : Do you see the prospects of viroids being used as plants vectors in near future?

Question :Do you justify the statutory ban on amniocentesis in our country ? Give reasons.

Question : Do you consider passive smoking is more dangerous than active smoking ? Why?

Question : Do you consider passive smoking is more dangerous than active smoking? Why?

Question : Do you agree with the statement that microbes are omnipresent?