MCQs For NCERT Class 12 Biology Chapter 9 Strategies for Enhancement in Food Production

MCQs Class 12

Please refer to the MCQ Questions for Class 12 Biology Chapter 9 Strategies for Enhancement in Food Production with Answers. The following Strategies for Enhancement in Food Production Class 12 Biology MCQ Questions has been designed based on the latest syllabus and examination pattern for Class 12. Our experts have designed MCQ Questions for Class 12 Biology with Answers for all chapters in your NCERT Class 12 Biology book.

Strategies for Enhancement in Food Production Class 12 MCQ Questions with Answers

See below Strategies for Enhancement in Food Production Class 12 Biology MCQ Questions, solve the questions and compare your answers with the solutions provided below.

Question. Interspecific hybridisation is the mating of
(a) animals within same breed without having common ancestors
(b) two different related species
(c) superior males and females of different breeds
(d) more closely related individuals within same breed for 4-6 generations.

Answer

B

Question. Among the following edible fishes, which one is a marine fish having rich source of omega-3 fatty acids?
(a) Mystus
(b) Mangur
(c) Mrigala
(d) Mackerel

Answer

D

Question. Haploid plants can be obtained by culturing
(a) pollen grains
(b) root tips
(c) young leaves
(d) endosperm.

Answer

A

Question. In crop movement programme, haploids are important because they
(a) require one half of nutrients
(b) are helpful in study of meiosis
(c) grow better under adverse conditions
(d) form perfect homozygous.

Answer

D

Question. An alga which can be employed as food for human being is
(a) Ulothrix
(b) Chlorella
(c) Spirogyra
(d) Polysiphonia

Answer

B

Question. A protoplast is a cell
(a) undergoing division
(b) without cell wall
(c) without plasma membrane
(d) without nucleus. 

Answer

B

Question. A technique of micropropagation is
(a) protoplast fusion
(b) embryo rescue
(c) somatic hybridisation
(d) somatic embryogenesis. 

Answer

D

Question. Haploid plants are preferred over diploids for mutation study because in haploids
(a) recessive mutation express immediately
(b) induction of mutations is easier
(c) culturing is easier
(d) dominant mutation express immediately.

Answer

A

Question. Which crop variety is not due to induced mutations?
(a) Reimei of rice
(b) Prabhat of arhar
(c) Sharbati Sonora of wheat
(d) Aruna of castor

Answer

D

Question. Tissue culture technique can produce infinite number of new plants from a small parental tissue. The economic importance of the technique is in raising
(a) genetically uniform population identical to the original parent
(b) homozygous diploid plants
(c) new species
(d) variants through picking up somaclonal variations

Answer

A

Question. Which part would be most suitable for raising virus-free plants for micropropagation ?
(a) Bark
(b) Vascular tissue
(c) Meristem
(d) Node 

Answer

C

Question. Somaclones are obtained by
(a) plant breeding
(b) irradiation
(c) genetic engineering
(d) tissue culture. 

Answer

D

Question. In order to obtain virus-free plants through tissue culture the best method is
(a) meristem culture
(b) protoplast culture
(c) embryo rescue
(d) anther culture.

Answer

A

Question. Which of the following enhances or induces fusion of protoplasts?
(a) IAA and kinetin
(b) IAA and gibberellins
(c) Sodium chloride and potassium chloride
(d) Polyethylene glycol and sodium nitrate

Answer

D

Question. To obtain virus – free healthy plants from a diseased one by tissue culture technique, which part/parts of the diseased plant will be taken?
(a) Apical meristem only
(b) Palisade parenchyma
(c) Both apical and axillary meristems
(d) Epidermis only

Answer

C

Question. In tissue culture medium, the embryoids formed from pollen grains is due to
(a) cellular totipotency
(b) organogenesis
(c) double fertilization
(d) test tube culture.

Answer

A

Question. Coconut milk is used in tissue culture in which present
(a) cytokinin
(b) auxin
(c) gibberellin
(d) ethylene.

Answer

A

Question. Cellular totipotency was demonstrated by
(a) Theodore Schwann
(b) A.V. Leeuwenhoek
(c) F.C. Steward
(d) Robert Hooke.

Answer

C

Question. Which ones produce androgenic haploids in anther cultures?
(a) Anther wall
(b) Tapetal layer of anther wall
(c) Connective tissue
(d) Young pollen grains

Answer

D

Question. The chemical which are produced by host plants due to infection as a defence reaction to pathogen, are called
(a) phytotoxin
(b) toxin
(c) phytotron
(d) phytoalexins

Answer

D

Question. The technique of obtaining large number of plantlets by tissue culture method is called
(a) plantlet culture
(b) organ culture
(c) micropropagation
(d) macropropagation.

Answer

C

Question. Cellular totipotency is demonstrated by
(a) only gymnosperm cells
(b) all plant cells
(c) all eukaryotic cells
(d) only bacterial cells. 

Answer

B

Question. Azolla is used as a biofertilizer because it
(a) multiplies very fast to produce massive biomass
(b) has association of nitrogen-fixing Rhizobium
(c) has association of nitrogen-fixing Cyanobacteria
(d) has association of mycorrhiza

Answer

C

Question. Pruning of plants promotes branching because the axillary buds get sensitized to
(a) ethylene
(b) gibberellin
(c) cytokinin
(d) indole acetic acid

Answer

C

Question. Somaclonal variation can be obtained by
(a) application of colchicine
(b) irradiation with gamma rays
(c) tissue culture
(d) hybridisation

Answer

C

Question. Somaclonal variation appears in
(a) organisms produced through somatic hybridization.
(b) plants growing in highly polluted conditions.
(c) apomictic plants.
(d) tissue culture raised plants.

Answer

D

Question. A scion is grafted to a stock. The quality of fruits produced will be determined by the genotype of
(a) stock
(b) scion
(c) both stock and scion
(d) neither stock nor scion

Answer

B

Question. Cocoa is the plant from which chocolate is made. Which part is used to extract it?
(a) Flower
(b) Fruit
(c) Seeds
(d) Bark

Answer

C

Question. Auxanometer is used to measure
(a) length
(b) respiration
(c) transpiration
(d) ascent of sap

Answer

A

Question. Crop rotation is used to increase
(a) soil fertility
(b) pore size and soil particle
(c) organic content of soil
(d) viscosity of soil water

Answer

A

Question. Haploid cultures can be obtained by culturing
(a) pollen grains
(b) embryo 
(c) shoot apex
(d) root apex

Answer

A

Question. Essential oils are those which
(a) are essential to the plant itself
(b) are used as lubricants
(c) produce perfumes
(d) are essential for human beings

Answer

C

Question. Coconut water is rich in
(a) auxins
(b) gibberellins
(c) abscisic acid
(d) cytokinin

Answer

D

Question. Which of the following is the pair of biofertilizers?
(a) Azolla and BGA
(b) Nostoc and legume
(c) Rhizobium and grasses
(d) Salmonella & E. coli

Answer

A

Question. Hisardale is a new breed of sheep developed in Punjab by one of the breeding technique in which superior male of one breed is mated with superior females of another breed. Identify the breeding technique from the option given below.
(a) Inbreeding
(b) Out crossing
(c) Out breeding
(d) Cross breeding

Answer

D

Question. Biodiversity loss occurs due to the reasons given below.
(i) Habitat loss and fragmentation
(ii) Co-extinction
(iii) Over-exploitation
(iv) Alien species invasion
Identify the correct reasons.
(a) (i) and (ii)
(b) (i), (ii) and (iii)
(c) (ii), (iii) and (iv)
(d) (i), (ii), (iii) and (iv)

Answer

D

Question. Explant is required to be disinfected before placing in culture. This is done by
(a) autoclaving 
(b) ultra-violet rays
(c) clorax or hypochlorite
(d) X-rays

Answer

C

Question. Which of the following is a viral disease of poultry birds?
(a) Anthrax
(b) Ranikhet
(c) Coccidiosis
(d) None of these

Answer

B

Question. Inbreeding depression
(a) usually increases fertility only.
(b) usually reduces productivity only.
(c) usually reduces fertility and productivity.
(d) usually increases fertility and productivity.

Answer

C

Question. Which one of the following is a new breed of sheep developed in Punjab by crossing Bikaneri ewes and Marino rams?
(a) Hisardale
(b) White Leghorn
(c) Assel
(d) Langshan

Answer

A

Question. The ‘mule’ is the result of
(a) inbreeding depression
(b) out-breeding
(c) cross-breeding
(d) inter-specific hybridization

Answer

D

Question. MOET stands for
(a) Multiple Ovulation and Embryo Transfer Technology
(b) Multiple Ovulation Energy Transport Technology
(c) Method of Ovulation Energy Transfer Technology
(d) Method of Ovulation Energy Transport Technology

Answer

A

Question. Which of the following stage is transferred to surrogate mothers in livestock breeding experiments?
(a) Unfertilized eggs
(b) Fertilized eggs
(c) 8 to 32 celled embryo
(d) Frozen semen

Answer

C

Question. A branch of science that deals with the maintenance of hives of honeybees for the production of honey is called ______.
(a) aquaculture
(b) pisciculture
(c) apiculture
(d) sericulture

Answer

C

Question. Which of the following is a viral disease of poultry birds?
(a) Anthrax
(b) Ranikhet
(c) Coccidiosis
(d) None of these

Answer

B

Question. Inbreeding depression
(a) usually increases fertility only.
(b) usually reduces productivity only.
(c) usually reduces fertility and productivity.
(d) usually increases fertility and productivity.

Answer

C

Question. Which of the following species of honeybee is reared in artificial hives?
(a) Apis indica
(b) Apis florea
(c) Apis rohita
(d) Apis dorsata

Answer

A

Question. Which one of the following is a freshwater fish?
(a) Catla
(b) Rohu
(c) Common carp
(d) All of these

Answer

D

Question. The new varieties of plants are produced by
(a) selection and hybridization.
(b) mutation and selection.
(c) introduction and mutation.
(d) selection and introduction.

Answer

A

Question. Pusa Snowball K–1 is a variety of
(a) wheat
(b) chilli
(c) cowpea
(d) cauliflower

Answer

D

Question. Which one of the following is/are marine fish?
(a) Rohu
(b) Hilsa
(c) Mackerel
(d) Both (b) and (c)

Answer

D

Question. 33 percent of India’s GDP (Gross Domestic Product) comes from ______________ and employs _____________ percent of the population.
(a) industry; 70
(b) agriculture; 62
(c) export; 30
(d) agriculture; 75

Answer

B

Question. Haploid plants can be obtained by culturing
(a) pollen grains
(b) root tips
(c) young leaves
(d) endosperm.

Answer

A

Question. In crop movement programme, haploids are important because they
(a) require one half of nutrients
(b) are helpful in study of meiosis
(c) grow better under adverse conditions
(d) form perfect homozygous.

Answer

D

Question. An alga which can be employed as food for human being is
(a) Ulothrix
(b) Chlorella
(c) Spirogyra
(d) Polysiphonia

Answer

B

Question. A protoplast is a cell
(a) undergoing division
(b) without cell wall
(c) without plasma membrane
(d) without nucleus. 

Answer

B

Question. A technique of micropropagation is
(a) protoplast fusion
(b) embryo rescue
(c) somatic hybridisation
(d) somatic embryogenesis. 

Answer

D

Question. Haploid plants are preferred over diploids for mutation study because in haploids
(a) recessive mutation express immediately
(b) induction of mutations is easier
(c) culturing is easier
(d) dominant mutation express immediately.

Answer

A

Question. Which crop variety is not due to induced mutations?
(a) Reimei of rice
(b) Prabhat of arhar
(c) Sharbati Sonora of wheat
(d) Aruna of castor

Answer

D

Question. Tissue culture technique can produce infinite number of new plants from a small parental tissue. The economic importance of the technique is in raising
(a) genetically uniform population identical to the original parent
(b) homozygous diploid plants
(c) new species
(d) variants through picking up somaclonal variations

Answer

A

Question. Which part would be most suitable for raising virus-free plants for micropropagation ?
(a) Bark
(b) Vascular tissue
(c) Meristem
(d) Node 

Answer

C

Question. Somaclones are obtained by
(a) plant breeding
(b) irradiation
(c) genetic engineering
(d) tissue culture. 

Answer

D

Question. In order to obtain virus-free plants through tissue culture the best method is
(a) meristem culture
(b) protoplast culture
(c) embryo rescue
(d) anther culture.

Answer

A

Question. Which of the following enhances or induces fusion of protoplasts?
(a) IAA and kinetin
(b) IAA and gibberellins
(c) Sodium chloride and potassium chloride
(d) Polyethylene glycol and sodium nitrate

Answer

D

Question. To obtain virus – free healthy plants from a diseased one by tissue culture technique, which part/parts of the diseased plant will be taken?
(a) Apical meristem only
(b) Palisade parenchyma
(c) Both apical and axillary meristems
(d) Epidermis only

Answer

C

Question. In tissue culture medium, the embryoids formed from pollen grains is due to
(a) cellular totipotency
(b) organogenesis
(c) double fertilization
(d) test tube culture.

Answer

A

Question. Coconut milk is used in tissue culture in which present
(a) cytokinin
(b) auxin
(c) gibberellin
(d) ethylene.

Answer

A

Question. Cellular totipotency was demonstrated by
(a) Theodore Schwann
(b) A.V. Leeuwenhoek
(c) F.C. Steward
(d) Robert Hooke.

Answer

C

Question. Which ones produce androgenic haploids in anther cultures?
(a) Anther wall
(b) Tapetal layer of anther wall
(c) Connective tissue
(d) Young pollen grains

Answer

D

Question. The chemical which are produced by host plants due to infection as a defence reaction to pathogen, are called
(a) phytotoxin
(b) toxin
(c) phytotron
(d) phytoalexins

Answer

D

Question. The technique of obtaining large number of plantlets by tissue culture method is called
(a) plantlet culture
(b) organ culture
(c) micropropagation
(d) macropropagation.

Answer

C

Question. Cellular totipotency is demonstrated by
(a) only gymnosperm cells
(b) all plant cells
(c) all eukaryotic cells
(d) only bacterial cells. 

Answer

B

Question. Azolla is used as a biofertilizer because it
(a) multiplies very fast to produce massive biomass
(b) has association of nitrogen-fixing Rhizobium
(c) has association of nitrogen-fixing Cyanobacteria
(d) has association of mycorrhiza

Answer

C

Question. Pruning of plants promotes branching because the axillary buds get sensitized to
(a) ethylene
(b) gibberellin
(c) cytokinin
(d) indole acetic acid

Answer

C

Question. Somaclonal variation can be obtained by
(a) application of colchicine
(b) irradiation with gamma rays
(c) tissue culture
(d) hybridisation

Answer

C

Question. Somaclonal variation appears in
(a) organisms produced through somatic hybridization.
(b) plants growing in highly polluted conditions.
(c) apomictic plants.
(d) tissue culture raised plants.

Answer

D

Question. A scion is grafted to a stock. The quality of fruits produced will be determined by the genotype of
(a) stock
(b) scion
(c) both stock and scion
(d) neither stock nor scion

Answer

B

Question. Cocoa is the plant from which chocolate is made. Which part is used to extract it?
(a) Flower
(b) Fruit
(c) Seeds
(d) Bark

Answer

C

Question. Auxanometer is used to measure
(a) length
(b) respiration
(c) transpiration
(d) ascent of sap

Answer

A

Question. Crop rotation is used to increase
(a) soil fertility
(b) pore size and soil particle
(c) organic content of soil
(d) viscosity of soil water

Answer

A

Question. Haploid cultures can be obtained by culturing
(a) pollen grains
(b) embryo 
(c) shoot apex
(d) root apex

Answer

A

Question. Essential oils are those which
(a) are essential to the plant itself
(b) are used as lubricants
(c) produce perfumes
(d) are essential for human beings

Answer

C

Question. Coconut water is rich in
(a) auxins
(b) gibberellins
(c) abscisic acid
(d) cytokinin

Answer

D

Question. Which of the following is the pair of biofertilizers?
(a) Azolla and BGA
(b) Nostoc and legume
(c) Rhizobium and grasses
(d) Salmonella & E. coli

Answer

A

Question. Hisardale is a new breed of sheep developed in Punjab by one of the breeding technique in which superior male of one breed is mated with superior females of another breed. Identify the breeding technique from the option given below.
(a) Inbreeding
(b) Out crossing
(c) Out breeding
(d) Cross breeding

Answer

D

Question. Biodiversity loss occurs due to the reasons given below.
(i) Habitat loss and fragmentation
(ii) Co-extinction
(iii) Over-exploitation
(iv) Alien species invasion
Identify the correct reasons.
(a) (i) and (ii)
(b) (i), (ii) and (iii)
(c) (ii), (iii) and (iv)
(d) (i), (ii), (iii) and (iv)

Answer

D

Question. Explant is required to be disinfected before placing in culture. This is done by
(a) autoclaving 
(b) ultra-violet rays
(c) clorax or hypochlorite
(d) X-rays

Answer

C

Question. Which of the following is a viral disease of poultry birds?
(a) Anthrax
(b) Ranikhet
(c) Coccidiosis
(d) None of these

Answer

B

Question. Inbreeding depression
(a) usually increases fertility only.
(b) usually reduces productivity only.
(c) usually reduces fertility and productivity.
(d) usually increases fertility and productivity.

Answer

C

Question. Which one of the following is a new breed of sheep developed in Punjab by crossing Bikaneri ewes and Marino rams?
(a) Hisardale
(b) White Leghorn
(c) Assel
(d) Langshan

Answer

A

Question. The ‘mule’ is the result of
(a) inbreeding depression
(b) out-breeding
(c) cross-breeding
(d) inter-specific hybridization

Answer

D

Question. MOET stands for
(a) Multiple Ovulation and Embryo Transfer Technology
(b) Multiple Ovulation Energy Transport Technology
(c) Method of Ovulation Energy Transfer Technology
(d) Method of Ovulation Energy Transport Technology

Answer

A

Question. Which of the following stage is transferred to surrogate mothers in livestock breeding experiments?
(a) Unfertilized eggs
(b) Fertilized eggs
(c) 8 to 32 celled embryo
(d) Frozen semen

Answer

C

Question. A branch of science that deals with the maintenance of hives of honeybees for the production of honey is called ______.
(a) aquaculture
(b) pisciculture
(c) apiculture
(d) sericulture

Answer

C

Question. Which of the following is a viral disease of poultry birds?
(a) Anthrax
(b) Ranikhet
(c) Coccidiosis
(d) None of these

Answer

B

Question. Inbreeding depression
(a) usually increases fertility only.
(b) usually reduces productivity only.
(c) usually reduces fertility and productivity.
(d) usually increases fertility and productivity.

Answer

C

Question. Which of the following species of honeybee is reared in artificial hives?
(a) Apis indica
(b) Apis florea
(c) Apis rohita
(d) Apis dorsata

Answer

A

Question. Which one of the following is a freshwater fish?
(a) Catla
(b) Rohu
(c) Common carp
(d) All of these

Answer

D

Question. The new varieties of plants are produced by
(a) selection and hybridization.
(b) mutation and selection.
(c) introduction and mutation.
(d) selection and introduction.

Answer

A

Question. Pusa Snowball K–1 is a variety of
(a) wheat
(b) chilli
(c) cowpea
(d) cauliflower

Answer

D

Question. Which one of the following is/are marine fish?
(a) Rohu
(b) Hilsa
(c) Mackerel
(d) Both (b) and (c)

Answer

D

Question. 33 percent of India’s GDP (Gross Domestic Product) comes from ______________ and employs _____________ percent of the population.
(a) industry; 70
(b) agriculture; 62
(c) export; 30
(d) agriculture; 75

Answer

B

Question. Outbreeding is an important strategy of animal husbandry because it
(a) is useful in overcoming inbreeding depression
(b) exposes harmful recessive genes that are eliminated by selection
(c) helps in accumulation of superior genes
(d) is useful in producing purelines of animals.

Answer

A

Question. Compared to a bull a bullock is docile because of
(a) higher levels of cortisone
(b) lower levels of blood testosterone
(c) lower levels of adrenaline/noradrenaline in its blood
(d) higher levels of thyroxine.

Answer

B

Question. By which method was a new breed ‘Hisardale’ of sheep formed by using Bikaneri ewes and Marino rams?
(a) Out crossing
(b) Mutational breeding
(c) Cross breeding
(d) Inbreeding

Answer

C

Question. Select the incorrect statement. D
(a) Inbreeding helps in accumulation of superior genes and elimination of undesirable genes.
(b) Inbreeding increases homozygosity.
(c) Inbreeding is essential to evolve purelines, in any animal.
(d) Inbreeding selects harmful recessive gene that reduce fertility and productivity.

Answer

Question. Homozygous purelines in cattle can be obtained by
(a) mating of unrelated individuals of same breed
(b) mating of individuals of different breed
(c) mating of individuals of different species
(d) mating of related individuals of same breed.

Answer

D

Question. Which fish selectively feed on larva of mosquito?
(a) Gambusia
(b) Rohu
(c) Clarias
(d) Exocoetus

Answer

A

Question. Which statement is correct?
(a) A. indica is largest wild honeybee.
(b) Wax is waste material of honeybee.
(c) Workers are the smallest of the three castes.
(d) Drone of honeybee is diploid. 

Answer

C

Question. The term aquaculture means
(a) inland fisheries
(b) aspergillosis
(c) marine fisheries
(d) both (a) and (c).

Answer

D

Question. Fish, which eradicate the mosquito larva, is
(a) Gambusia
(b) cutter fish
(c) Anabus
(d) rohu. 

Answer

A

Question. Life span of a worker bee is
(a) 6 weeks
(b) 10 weeks
(c) 10 days
(d) 15 days. 

Answer

A

Question. Which one of the following is a viral disease of poultry?
(a) Coryza
(b) New castle disease
(c) Pasteurellosis
(d) Salmonellosis

Answer

B

Question. The world’s highly prized wool yielding ‘Pashmina’ breed is
(a) goat
(b) sheep
(c) goat-sheep cross
(d) Kashmir sheep – Afghan sheep cross.

Answer

A

Question. High milk yielding varieties of cows are obtained by
(a) use of surrogate mothers
(b) superovulation
(c) artificial insemination
(d) all of these. 

Answer

D

Question. Which one of the following constitutes natural silk?
(a) Nitrogen
(b) Magnesium
(c) Potassium
(d) Phosphorus

Answer

A

Question. Which one of the following fish is introduced into India by foreigners?
(a) Mystus singhala
(b) Clarius batrachus
(c) Labeo rohita
(d) Pomfret 

Answer

D

Question. The silkworm silk is the product of
(a) salivary gland of the larva
(b) salivary gland of the adult
(c) cuticle of the larva
(d) cuticle of the adult. 

Answer

A

Question. Silk is produced by
(a) adult moth
(b) cocoon
(c) larva
(d) both (a) and (c).

Answer

C

Question. Which among the following is the real product of the honeybee?
(a) Honey
(b) Propolis
(c) Pollen
(d) Beewax

Answer

D

Question. Honey is
(a) alkaline
(b) basic after some days
(c) acidic
(d) neutral. 

Answer

C

Question. Pebrine is a disease of
(a) silkworm
(b) lac insect
(c) honeybee
(d) fish. 

Answer

A

Question. Silk thread is obtained from silk moth during
(a) pupal stage
(b) larval stage
(c) nymph stage
(d) adult stage.

Answer

A

Question. In plant breeding programmes, the entire collection (of plants/seeds) having all the diverse alleles for all genes in a given crop is called
(a) evaluation and selection of parents
(b) germplasm collection
(c) selection of superior recombinants
(d) cross-hybridisation among the selected parents. 

Answer

B

Question. Green revolution in India occurred during
(a) 1960’s
(b) 1970’s
(c) 1980’s
(d) 1950’s. 

Answer

A

Question. A collection of plants and seed having diverse alleles of all the genes of a crop is called
(a) herbarium
(b) germplasm
(c) gene library
(d) genome. 

Answer

B

Question. “Jaya” and “Ratna” developed for green revolution in India are the varieties of
(a) maize
(b) rice
(c) wheat
(d) bajra. 

Answer

B

Question. A true breeding plant is
(a) one that is able to breed on its own
(b) produced due to cross-pollination among unrelated plants
(c) near homozygous and produces offspring of its own kind
(d) always homozygous recessive in its genetic constitution. 

Answer

C

Question. A system of rotating crops with legume or grass pasture to improve soil structure and fertility is called
(a) strip farming
(b) shifting agriculture
(c) ley farming
(d) contour farming.

Answer

C

Question. Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide?
(a) Loose smut of wheat
(b) Black rust of wheat
(c) Bacterial leaf blight of rice
(d) Downy mildew of grapes

Answer

D

Question. In maize, hybrid vigour is exploited by
(a) crossing of two inbred parental lines
(b) harvesting seeds from the most productive plants
(c) inducing mutations
(d) bombarding the seeds with DNA. 

Answer

A

Question. In the hexaploid wheat, the haploid (n) and basic (x) numbers of chromosomes are
(a) n = 21 and x = 21
(b) n = 21 and x = 14
(c) n = 21 and x = 7
(d) n = 7 and x = 21.

Answer

C

Question. Crop plants grown in monoculture are
(a) highly prone to pests
(b) low in yield
(c) free from intraspecific competition
(d) characterised by poor root system. 

Answer

A

Question. In maize, hybrid vigour is exploited by
(a) inducing mutations
(b) bombarding the protoplast with DNA
(c) crossing of two inbred parental lines
(d) harvesting seeds from the most productive plants. 

Answer

C

Question. ‘Himgiri’ developed by hybridisation and selection for disease resistance against rust pathogens is a variety of
(a) chilli
(b) maize
(c) sugarcane
(d) wheat. 

Answer

D

Question. Three crops that contribute maximum to global food grain production are
(a) wheat, rice and maize
(b) wheat, rice and barley
(c) wheat, maize and sorghum
(d) rice, maize and sorghum. 

Answer

A

Question. Which of the following is generally used for induced mutagenesis in crop plants?
(a) X-rays
(b) UV (260 nm)
(c) Gamma rays (from cobalt-60)
(d) Alpha particles

Answer

C

Question. The name of Norman Borlaug is associated with
(a) white revolution
(b) green revolution
(c) yellow revolution
(d) blue revolution.

Answer

B

Question. India’s wheat yield revolution in the 1960s was possible primarily due to
(a) hybrid seeds
(b) increased chlorophyll content
(c) mutations resulting in plant height reduction
(d) quantitative trait mutations. 

Answer

D

Question. When a diploid female plant is crossed with a tetraploid male, the ploidy of endosperm cells in the resulting seed is
(a) tetraploidy
(b) pentaploidy
(c) diploidy
(d) triploidy. 

Answer

A

Question. If a diploid cell is treated with colchicine then it becomes
(a) triploid
(b) tetraploid
(c) diploid
(d) monoploid. 

Answer

B

Question. Breeding of crops with high levels of minerals, vitamins and proteins is called
(a) somatic hybridisation
(b) biofortification
(c) biomagnification
(d) micropropagation.

Answer

B

Question. Triticale, the first man-made cereal crop, has been obtained by crossing wheat with
(a) barley
(b) rye
(c) pearl millet
(d) sugarcane. 

Answer

B

Question. Triticale is obtained by crossing wheat with
(a) oat
(b) barley
(c) maize
(d) rye. 

Answer

D

Question. The new varieties of plants are produced by
(a) introduction and mutation
(b) selection and introduction
(c) selection and hybridization
(d) mutation and selection. 

Answer

C

Question. The reason for vegetatively reproducing crop plants to suit for maintaining hybrid vigour is that
(a) they are more resistant to diseases
(b) once a desired hybrid produced, no chances of losing it
(c) they can be easily propagated
(d) they have a longer life span.

Answer

B

Question. If an angiospermic male plant is diploid and female plant tetraploid, the ploidy level of endosperm will be
(a) tetraploid
(b) pentaploid
(c) haploid
(d) triploid.

Answer

B

Question. Which of the following is the New World spice, that has become an essential part of Indian cuisine?
(a) Red pepper
(b) Black pepper
(c) Ginger
(d) Cardamom

Answer

A

Question. Which of the following crops have been brought to India from New world?
(a) Cashewnut, potato, rubber
(b) Mango, tea
(c) Tea, rubber, mango
(d) Coffee

Answer

A

Question. Before the European invader which vegetable was absent in India?
(a) Potato and tomato
(b) Shimla mirch and brinjal
(c) Maize and chichinda
(d) Bitter gourd 

Answer

A

Strategies for Enhancement in Food Production Class 12 Biology MCQ Questions