24277 + Interview Questions in Biology in Class 12 Page 440 InterviewSolution

21951.	Question : Ancestorof man who firststodd erect was
Answer» Javamam AUSTRALOPITHECUS Pekingsmam Cro- MAGNON ANSWER :B

Discussion

21952.	Question : Anatomical unit of muscle is :-
Answer» Sarcomere Myofibrils Muscle fibre Actin and MYOSIN protein Answer :C

Discussion

21953.	Question : Anatomical structures that have similar functions but not similar structures are called
Answer» (a) Homologous STRUCTURES (B) Vestigial structures (c) ANALOGUS structures (d) GENERALIZED sturctures Solution :Analogus structures

Discussion

21954.	Question : Anatomic dead space in the respiratory tract of man is about
Answer» 1.5 L 500 mL 250 mL 150 ml Answer :D

Discussion

21955.	Question : Anaphase promoting complex (APC) is formed by:-
Answer» Sperm Secondary oocyte Ovum All the above Answer :B

Discussion

21956.	Question : Anaphase Promoting Complex (APC) is a protein degradation machinery necessary for proper mitosis of animal cells.If APC is defective in a human cell,which of the following is expected to occur?
Answer» RECOMBINATION of CHOROMOSOME ARMS will occur Choromosomes will not condense Choromosomes will be fragmented Chromosomes will not segregate Answer :D

Discussion

21957.	Question : Anaphase-II separation is:
Answer» Equational Reductional Both(a) and (B) NONE of these Answer :A

Discussion

21958.	Question : Anamnestic response is caused by :-
Answer» MEMORY cells Helper T-cells T-killer Cancer cells Answer :A

Discussion

21959.	Question : Analyze the table given below and fill in the blanks suitably.
Answer» SOLUTION :STANDING crop The amount of NUTRIENTS presents in the soil or ECOSYSTEM at any given TIME.

Discussion

21960.	Question : Analyze the figure, find out the error and correct.
Answer» SOLUTION :

Discussion

21961.	Question : Analysis of meteorite contents tells us that:
Answer» Life came on EARTH due to meteorite hits Similar processes are occurring elsewhere in space that had OCCURRED on earth All stars originated at same time Water is essential for ORIGIN of life Answer :B

Discussion

21962.	Question : "Analysis of age-pyramids for human population can provide important inputs for long-term planning strategies." Explain.
Answer» SOLUTION :Analysis of age pyramiads for human population can provide important inputs for long term planning strategies. The DIFFERENT age groups present in a poputation determine its reproductive status. Distribution of age groups highly influences the growth of the population Each population displays following THREE ecological ages or age group, Population having large number of young members grow rapidly, while the population bearing more number of postreproductive members tends to be declining. There are basically three TYPES of age pyramids found to be ·present in human population. These are as follows. Trough the anlauysis of the age pyramids of a particular population, the. distibution ofresources can be done more efficiently. A better planning strategy can be adopted considering the demand of the resource, thus, long term managment of resources can be done in such .a way that the population can derive MAXIMUM benefit with minimum effect on nature, leading the population to floursh efficiently.

Discussion

21963.	Question : Analyse the situationgiven belowand comment on it ."fertilizersfroma paddyfield flows to nearby pond."
Answer» SOLUTION :PRESENCEOF large amountof nutrientscaused by sewagedisposalcauses excessivegrowthof planktonic ALGAE which impartsdistinctcolor & decreases qualityof WATER &increasesmortality of fishes.

Discussion

21964.	Question : Analyse the given scheme and answer the questions.{:("Incident solar radiation"-100%),(""darr),("Photosynthetically Active Radiation (PAR)"-50%),(""darr),("Net primary productivity"-0.8%-4%):}a.50% of solar radiation is available for photosynthesis. Evaluate.b.Net primary productivity is only 0.8-4%. Justify.c.Can you suggest a remedial measure to increase the primary productivity ?
Answer» Solution :a.50% of solar RADIATION is reflected back as clouds, absorbed by ozone layer, WATER vapour and scattered as dust particles. b.Remaining energy is lost in the form of HEAT due to respiration. c.Plant more green plants which INCREASE PRIMARY productivity.

Discussion

21965.	Question : Analyse the given graph and answer the following questions.Lable a,b,c.
Answer» Solution :a) Conformers B)REGULATORS C) PARTIAL regulators

Discussion

21966.	Question : Analyse the given diagram which steps involved in the procedure of selecting transformed bacteria. Identify the bacterial colony which has undergone transformation ?
Answer» colony 5 Colony 2 Colony 4 Colony 3 Solution :BACTERIAL colony 4 FAILS to grown on agar containing tetracyline and ampicillin and must therefore contain the INACTIVE tetracycline resistance gene with the INSERTED DNA. These bacteria are transformed, hence should be cloned and amplified.

Discussion

21967.	Question : Analogy in the vertebrate limb structure has give rise to a phenomena known as adaptive radiation.
Answer» ANSWER :HOMOLOGY

Discussion

21968.	Question : Analogous structures are the result of
Answer» ADAPTIVE radiation Parallel evolution Convergent evolution Both (2)and(3) ANSWER :D

Discussion

21969.	Question : Analogous structures are a result of
Answer» CONVERGENT EVOLUTION shared ancestry STABILISING selection DIVERGENT evolution Solution :convergent evolution

Discussion

21970.	Question : Analogousstructureare a resultof (2016 - 1)
Answer» Divergentevolution CONVERGENT evolution Shared ancestry Stabilizingselection . ANSWER :B

Discussion

21971.	Question : Analogous organs lead to which type of evolution?
Answer» SOLUTION :Analogous ORGANS lead to CONVERGENT TYPE of evolution.

Discussion

21972.	Question : Analogous organs
Answer» Solution :They have almost similar APPEARANCE and perform the same function but these develop in totally different groups and are totally different in their basic structure and developmental origin e.g. Wings of butterfly (chitinous), bird (feathered), Pterodactyle and bat (skin fold) SERVE the same purpose of UPLIFTING the body in AIR but DIFFER in structure.

Discussion

21973.	Question : Analogous organs arise due to
Answer» divergent EVOLUTION artificial selection genetic drift CONVERGENT evolution. SOLUTION :The organs which have similar FUNCTIONS but are different in their structural detaisl and origin are called analogous organs. The analogous structures are the result of convergent evolution.

Discussion

21974.	Question : Analgesic drug :
Answer» FORMS tissue Relieves pain Relieves FATIGUE CAUSE pain Answer :B

Discussion

21975.	Question : Analgesic drugs
Answer» FORM tissues Cause pain Relieve fatigue Relieve pain Answer :D

Discussion

21976.	Question : Anal gills occur in
Answer» Doris Limax Slug Nautilus Solution :N//A

Discussion

21977.	Question : Anaerobic respiration in animals produces:
Answer» `CO_2` and `H_2 O` `C_2 H_5 OH` ,`CO_2` LACTIC ACID and `H_2 O` Pyruvic acid and `H_2 O` ANSWER :C

Discussion

21978.	Question : An unrestricted reproductive capacity is called
Answer» BIRTH RATE BIOTIC potential Carrying CAPACITY Fertility ANSWER :B

Discussion

21979.	Question : An over-ripe apple releases_____
Answer» ANSWER :ETHYLENE

Discussion

21980.	Question : An organism uses 20 amino acids while its DNA is made up of 6 types of nitrogenous bases. What would be the minimum size of a codon ?
Answer» 6 4 3 2 Answer :d

Discussion

21981.	Question : An organism used as a biofertilizer for raising soyabean crop is:
Answer» Azotobacter Azospirillum Rhizobium Nostac Answer :C

Discussion

21982.	Question : An organism used as a biofertiliser for raising soyabean crop is
Answer» AZOTOBACTER Azospirillum RHIZOBIUM NOSTOC Answer :C

Discussion

21983.	Question : An organism with more than two sets of chromosomes.
Answer» SOLUTION :POLYPOID

Discussion

21984.	Question : An organism has to overcome stressful condition for a limited period of time.Which straegies can it adopt to do so ?
Answer» SOLUTION :(i) MIGRATION (II) SUSPENSION of active life by hibernation/aestivation/spore FORMATION

Discussion

21985.	Question : An organism contains carbon molecules which have passed through three levels of ecosystem.The organism isa:
Answer» PRIMARY consumer Tertiary consumer Predator Producer Answer :B

Discussion

21986.	Question :An organic substance that can withstand environ mental extremes and cannot be degraded by any enzyme is
Answer» CUTICLE SPOROPOLLENIN LIGNIN Cellulose Answer :B

Discussion

21987.	Question : An order can be best defined as :-
Answer» A GROUP of related species and genera of DIFFERENT taxa A group of related FAMILIES which exhibit a few similar characters A group of related CLASSES which exhibit a few similarites An assemblage of genera related to different classes Answer :B

Discussion

21988.	Question : An orchid plant is growing on the branch of mango tree.How do you describe this interaction?
Answer» SOLUTION :It is an EXAMPLE of commensalism,where the orchid gets space(benificitted) but the MANGO TREE is neither BENEFITTED nor hurmed.

Discussion

21989.	Question : An orchid plant is growing on the branch of mango tree. How do you describe this interaction between the orchid and the mango tree?
Answer» Solution :It is an EXAMPLE of COMMENSALISM, where the orchid GETS space (benefited) and the mango TREE is NEITHER benefited nor harmed.

Discussion

21990.	Question : an orchids resembling the female of an insect so as to be able to get pollinated is due to phenomenon of
Answer» mimicry pseudo coputation pseudo pollination pseudo-parthenocarpy ANSWER :A

Discussion

21991.	Question : An orchid plant is growing on the branch of mango tree. How do you describe the interaction between orchid and mango tree?
Answer» Solution :It is a commensalism because orchid is benefited by GETTING shelter from mango TREE WHEREAS the mango tree is neither HARMED nor benefited.

Discussion

21992.	Question : Anorchid plant is growingon the branchof mango tree. How do youdescribethis interactionbetweenthe orchidand themangeo tree ?
Answer» SOLUTION :THEINTERACTION betweenorchidand themangotreeis termedcommensalism WHEREIN orchidderivesbenefitof interactionwhilemangotree is notaffected.

Discussion

21993.	Question : An operon consists of
Answer» STRUCTURAL genes Operator gene Promoter gene All these Answer :D

Discussion

21994.	Question : An operon is a:
Answer» (a) Protein that suppresses gene EXPRESSION (b) Protein that ACCELERATES gene expression (c) CLUSTER of STRUCTURAL genes with related FUNCTION (d) Gene that switched other genes on or off Solution :Gene that switched other genes on or off

Discussion

21995.	Question : An old person requires spectacles for
Answer» READING DISTANT vision Both A and B Astigmatism. Answer :C

Discussion

21996.	Question : An O-group child cannot have parents of blood groups.
Answer» B and B A and B O and O AB and O Answer :D

Discussion

21997.	Question : An isolated population of humans with approximately equal numbers of blue-eyed and brown-eyed individuals was decimated by and earthquake. Only a few brown-eyed people remained to form the next generation. This kind of change in the gene pool is called a
Answer» Hardy-Weinberg equilibrium blocked gene flow bottle-neck EFFECT gene migration Solution :When the population is at decline, the number of individuals may REDUCE to a EXTENT that the small group of population constituting the population BECOMES isolated and restricted on distribution. These are then exposed to random genetic drift resulting in the fixation of certain genes. Thus, the population re-estacblishes its former nichness. Such REDUCTION in allele frequencies is called a genetic bottle-neck effect which often prevents the species from extinction.

Discussion

21998.	Question : An leucon canal system in characteristic of
Answer» Sycon Leucosolenia Spongilla None of the above Answer :C

Discussion

21999.	Question : An inverted pyramid of biomass is seen in
Answer» FOREST ECOSYSTEM Grassland ecosystem AQUATIC ecosystem DESERT SOLUTION :Aquatic ecosystem

Discussion

22000.	Question : An inverted pyramid of number and an inverted pyramid of biomass are repectively seen in :
Answer» GRASSLAND and TREE ecosystem SEA and tree ecosystem tree and sea ecosystem sea and grassland ecosystem Answer :C

Discussion

Explore topic-wise InterviewSolutions in .

Question : Ancestorof man who firststodd erect was

Question : Anatomical unit of muscle is :-

Question : Anatomical structures that have similar functions but not similar structures are called

Question : Anatomic dead space in the respiratory tract of man is about

Question : Anaphase promoting complex (APC) is formed by:-

Question : Anaphase Promoting Complex (APC) is a protein degradation machinery necessary for proper mitosis of animal cells.If APC is defective in a human cell,which of the following is expected to occur?

Question : Anaphase-II separation is:

Question : Anamnestic response is caused by :-

Question : Analyze the table given below and fill in the blanks suitably.

Question : Analyze the figure, find out the error and correct.

Question : Analysis of meteorite contents tells us that:

Question : "Analysis of age-pyramids for human population can provide important inputs for long-term planning strategies." Explain.

Question : Analyse the situationgiven belowand comment on it ."fertilizersfroma paddyfield flows to nearby pond."

Question : Analyse the given graph and answer the following questions.Lable a,b,c.

Question : Analyse the given diagram which steps involved in the procedure of selecting transformed bacteria. Identify the bacterial colony which has undergone transformation ?

Question : Analogy in the vertebrate limb structure has give rise to a phenomena known as adaptive radiation.

Question : Analogous structures are the result of

Question : Analogous structures are a result of

Question : Analogousstructureare a resultof (2016 - 1)

Question : Analogous organs lead to which type of evolution?

Question : Analogous organs

Question : Analogous organs arise due to

Question : Analgesic drug :

Question : Analgesic drugs

Question : Anal gills occur in

Question : Anaerobic respiration in animals produces:

Question : An unrestricted reproductive capacity is called

Question : An over-ripe apple releases_____

Question : An organism uses 20 amino acids while its DNA is made up of 6 types of nitrogenous bases. What would be the minimum size of a codon ?

Question : An organism used as a biofertilizer for raising soyabean crop is:

Question : An organism used as a biofertiliser for raising soyabean crop is

Question : An organism with more than two sets of chromosomes.

Question : An organism has to overcome stressful condition for a limited period of time.Which straegies can it adopt to do so ?

Question : An organism contains carbon molecules which have passed through three levels of ecosystem.The organism isa:

Question :An organic substance that can withstand environ mental extremes and cannot be degraded by any enzyme is

Question : An order can be best defined as :-

Question : An orchid plant is growing on the branch of mango tree.How do you describe this interaction?

Question : An orchid plant is growing on the branch of mango tree. How do you describe this interaction between the orchid and the mango tree?

Question : an orchids resembling the female of an insect so as to be able to get pollinated is due to phenomenon of

Question : An orchid plant is growing on the branch of mango tree. How do you describe the interaction between orchid and mango tree?

Question : Anorchid plant is growingon the branchof mango tree. How do youdescribethis interactionbetweenthe orchidand themangeo tree ?

Question : An operon consists of

Question : An operon is a:

Question : An old person requires spectacles for

Question : An O-group child cannot have parents of blood groups.

Question : An isolated population of humans with approximately equal numbers of blue-eyed and brown-eyed individuals was decimated by and earthquake. Only a few brown-eyed people remained to form the next generation. This kind of change in the gene pool is called a

Question : An leucon canal system in characteristic of

Question : An inverted pyramid of biomass is seen in

Question : An inverted pyramid of number and an inverted pyramid of biomass are repectively seen in :