Bihar Board 12th Biology Objective Answers Chapter 9 Strategies for Enhancement in Food Production

Bihar Board 12th Biology Objective Questions and Answers

Bihar Board 12th Biology Objective Answers Chapter 9 Strategies for Enhancement in Food Production

Question 1.
Which of the following is the “bird flu virus” ?
(a) H5N1
(b) Haemophilus influenzae
(c) HIV
(d) Rhino virus
Answer:
(a) H5N1

Question 2.
The infectious and contagious bacterial disease that affects cattle, buffaloes, horses, sheeps and goats is
(a) anthrax
(b) rinderpest
(c) tick fever
(d) necrosis
Answer:
(a) anthrax

Question 3.
Which of the following is an improved variety of chicken ?
(a) Jersey
(b) Leghorn
(c) Himgiri
(d) Kalyan Sona
Answer:
(b) Leghorn

Question 4.
Which of the following is a draught breed of Indian cattle ?
(a) Malvi
(b) Gir
(c) Sahiwal
(d) Deoni
Answer:
(a) Malvi

Question 5.
Holstein-Frisian, Brown Swiss and Jersey are all well known
(a) exotic breeds of cow
(b) exotic breeds of goat
(c) exotic breeds of poultry
(d) animal husbandry scientists
Answer:
(a) exotic breeds of cow

Question 6.
Which one of the following is a breed of cattle ?
(a) Ayrshire
(b) Ghagus
(c) Kadaknath
(d) Scampi
Answer:
(a) Ayrshire

Question 7.
Which one of the following poultry birds is not an English breed ?
(a) Sussex
(b) Australorp
(c) Orpington
(d) Minorca
Answer:
(b) Australorp

Question 8.
High milk yielding cross bred Frieswal cow is the product of
(a) Brown Swiss × Sahiwal
(b) Friesian × Sahiwal
(c) Holstein × Tharparkar
(d) Brown Swiss × Red sindhi
Answer:
(b) Friesian × Sahiwal

Question 9.
What strategy would you suggest if a person wants to evolve a pure line in an animal ?
(a) Cross-breeding
(b) Inbreeding
(c) Out-breeding
(d) artificia insemination
Answer:
(b) Inbreeding

Question 10.
Which of the following statements is not correct regarding inbreeding ?
(a) It is the breeding between animals of the same breed
(b) It decreases homozygosity
(c) It exposes harmful recessive genes
(d) It helps in accumulation os superior genes
Answer:
(b) It decreases homozygosity

Question 11.
The term “inbreeding depression” is related to
(a) increased fertility and productivity
(b) increased milk production
(c) reduced fertility & productivity
(d) reduced milk production
Answer:
(c) reduced fertility & productivity

Question 12.
Continued inbreeding, especially close inbreeding generally results in
(a) inbreeding depression
(b) inbreeding stimulation
(c) inbreeding hybridisation
(d) inbreeding mutation
Answer:
(a) inbreeding depression

Question 13.
The breeding carried out between animals of different breeds is called
(a) out-crossing
(b) cross-breeding
(c) inbreeding
(d) both (a) and (b)
Answer:
(b) cross-breeding

Question 14.
Which of the following is an example of a cross-breed ?
(a) Mule
(b) Hilsa
(c) Hisardale
(d) Sahiwal
Answer:
(c) Hisardale

Question 15.
Hisardale is a new breed of sheep developed in Punjab by crossing
(a) Merino ram and Bikaneri ewe
(b) Assel ram and White leghorn ewe
(c) Rhode Island ram and White leghorn ewe
(d) Cochin ram and Ghagus ewe
Answer:
(a) Merino ram and Bikaneri ewe

Question 16.
Crossing of individuals of two different species to produce a hybrid is called
(a) interspecific hybridisation
(b) intervarietal hybridisation
(c) intergeneric hybridisation
(d) intravarietal hybrididisation
Answer:
(a) interspecific hybridisation

Question 17.
Artificial insemination involves
(a) super ovulation
(b) semen collection
(c) egg collection
(d) embryo collection
Answer:
(b) semen collection

Question 18.
Artificial breeding of cattle is brough about by
(a) artiticial insemination
(b) super ovulation and embryo transplantation
(c) MOET
(d) all of these
Answer:
(d) all of these

Question 19.
MOET stands for
(a) Multiple Ovulation and Egg transfer Technology
(b) Multiple Ovary and Embryo Transfer Technology
(c) Multiple Ovulation Embryo Transfer Technology
(d) Method of Egg Transfer Technology
Answer:
(c) Multiple Ovulation Embryo Transfer Technology

Question 20.
Multiple ovulation embryo transfer technology is related to
(a) transfer of super embryo
(b) transfer of super eggs
(c) super ovulation and embryo transfer
(d) both (a) and (b)
Answer:
(c) super ovulation and embryo transfer

Question 21.
‘Lean meat’ is cosidered to be of high quality because it has
(a) lesser but easily digestible protein
(b) lesser lipid content
(c) more fat that makes the meqt softer
(d) longer table life due to lesser chances of infection
Answer:
(b) lesser lipid content

Question 22.
In livestock breeding experiments, which of the following stages is transferred to surrogate mothers ?
(a) Unfertilised eggs
(b) Fertilised eggs
(c) 8 to 32 celled embryo
(d) Frozen semen
Answer:
(c) 8 to 32 celled embryo

Question 23.
The term ‘apiculture’ refers to
(a) tissue culture
(b) pisciculture
(c) bee-keeping
(d) animal-keeping
Answer:
(c) bee-keeping

Question 24.
Which of the following plays a role in indigenous system of medicine ?
(a) Plant breeding
(b) Fisheries
(c) Apiculture
(d) MOET
Answer:
(c) Apiculture

Question 25.
In honey, the main constituent is
(a) calcium
(b) sugar
(c) protein
(d) water
Answer:
(b) sugar

Question 26.
Beewax is the secretion of badominal glands of
(a) drones
(b) worker bees
(c) queen bees
(d) works and queen bees
Answer:
(b) worker bees

Question 27.
Apis dorsata is
(a) little bee
(b) rock bee
(c) European bee
(d) Indian bee
Answer:
(b) rock bee

Question 28.
The use of honeybee is
(a) to help in pollination
(b) production of bees wax
(c) production of honey
(d) all of these
Answer:
(d) all of these

Question 29.
Keeping beehives in crop fields during flowering period increases
(a) crop yield
(b) honey yield
(c) weeds yield
(d) both (a) and (b)
Answer:
(d) both (a) and (b)

Question 30.
Which of the following is not a freshwater fish ?
(a) Salmon
(b) Mrigal
(c) Catla
(d) Rohu
Answer:
(a) Salmon

Question 31.
Which of the following are common freshwater fishes ?
(a) Mackerel and rohu
(b) Rohu, common carp and Catla
(c) Hilsa and sardine
(d) None of these
Answer:
(b) Rohu, common carp and Catla

Question 32.
Which one of the following is a marine fish ?
(a) Rohu
(b) Hilsa
(c) Catla
(d) Common carp
Answer:
(b) Hilsa

Question 33.
Which one of the following is an exotic carp species ?
(a) Labeo rohita
(b) Crprinus carpio
(c) Labeo bata
(d) Cirrhinus mrigals
Answer:
(b) Crprinus carpio

Question 34.
Aquaculture is the rearing and management of
(a) molluscs and crustaceans
(b) only freshwater fishes
(c) economically useful aquatic plants and animals
(d) only aquatic plants
Answer:
(c) economically useful aquatic plants and animals

Question 35.
Aquaculture does not include
(a) prawns
(b) fishes
(c) silkworms
(d) shell fishery
Answer:
(c) silkworms

Question 36.
Which of the following is correctly matched ?
(a) Sericulture – Fish
(b) Aquaculture – Mosquito
(c) Apiculture – Honeybee
(d) Pisciculture – Silkmoth
Answer:
(c) Apiculture – Honeybee

Question 37.
Germplasm collection is the collection of
(a) germ cells
(b) semens
(c) plants/seeds with all the diverse alleles for all genes
(d) egg cells
Answer:
(c) plants/seeds with all the diverse alleles for all genes

Question 38.
Major percentage of India’s Gross Domestic Product is constituted by
(a) industry
(b) agriculture
(c) export
(d) small scale cottage industry
Answer:
(b) agriculture

Question 39.
The Noble Laureate, who developed semi-dwarf wheat varieties in Mexioc was
(a) Norman E. Borlaug
(b) herbert Boyer
(c) William Harvey
(d) Typhoid Mary
Answer:
(a) Norman E. Borlaug

Question 40.
Jaya and Ratna are the semi-dwarf varieties of
(a) wheat
(b) rice
(c) cowpea
(d) mustard
Answer:
(b) rice

Question 41.
Turnip mosaic disease is caused by
(a) bacteria
(b) viruses
(c) nematodes
(d) fungi
Answer:
(b) viruses

Question 42.
Which of the following dieases is caused by virus ?
(a) Tobacco mosaic
(b) Late blight of potato
(c) Turnip mosaic
(d) Both (a) and (c)
Answer:
(d) Both (a) and (c)

Question 43.
Which of the following is incorrectly matched ?
Disease Causative organism
(a) Black rot of crucifers Bacteria
(b) Brown rust of wheat Fungi
(c) Late blight of potato Virus
(d) Red rot of sugarcane Fungi
Answer:
(c) Late blight of potato Virus

Question 44.
Which of the following dieases is caused by bacteria ?
(a) Tobacco mosaic
(b) Black rot of crucifers
(c) Red rot of sugarcane
(d) Lata blight of potato
Answer:
(b) Black rot of crucifers

Question 45.
Black rust of wheat is caused by
(a) Puccinia
(b) Albugo
(c) Ustilagp
(d) Cystopus
Answer:
(a) Puccinia

Question 46.
Which of the following is incorrectly paired ?
(a) What – Himgiri
(b) Milch breed – Sahiwal
(c) Rice – Ratna
(d) Pusa Komal – Brassica
Answer:
(d) Pusa Komal – Brassica

Question 47.
Yellow mosaic virus resistant variety “Parbhani Kranti” belongs to
(a) bhindi
(b) barley
(c) chilli
(d) cauliflower
Answer:
(a) bhindi

Question 48.
Hairy leaves of many plants are asociated with
(a) resistance to insect pests
(b) resistance to viruses
(c) resistance to fungi
(d) resistance to bacteria
Answer:
(a) resistance to insect pests

Question 49.
Resistance to jassids in cotton plants and to cereal leaf beetle in wheat plants is due to
(a) biochemical characters
(b) physiological characters
(c) morphological characters
(d) none of these
Answer:
(c) morphological characters

Question 50.
Maize generates resistance against stem borers by having
(a) low aspartic acid, high nitrogen and sugar content
(b) low aspartic acid and sugar but high nitrogen content
(c) high aspartic acid and nitrogen but low sugar content
(d) high aspartic acid, low nitrogen and sugar content
Answer:
(d) high aspartic acid, low nitrogen and sugar content

Question 51.
Biofortification refers to the development of crop plants which are
(a) resistant to disease
(b) resistant to insect pests
(c) having improved nutritional quality
(d) having improved iron content
Answer:
(c) having improved nutritional quality

Question 52.
A wheat variety, Atlas 66, which has been used as a donor for improving cultivated wheat is rich in
(a) iron
(b) carbohydrates
(c) proteins
(d) vitamins
Answer:
(c) proteins

Question 53.
Shakti, Ratten and Protina (varieties of maize) are rich in
(a) lysine
(b) glycine
(c) fats
(d) carbohydrates
Answer:
(a) lysine

Question 54.
Which of the following can be used for cultivation of SCP ?
(a) Animal manure
(b) Straw
(c) Molasses
(d) All of these
Answer:
(d) All of these

Question 55.
250 g of Methylophilus methy lotrophus can be expected
to produce tonnes of proteins.
(a) 15
(b) 25
(c) 40
(d) 50
Answer:
(b) 25

Question 56.
Single cell protein can be obtained from
(a) bacteria
(b) algae
(c) fungi
(d) all of these
Answer:
(d) all of these

Question 57.
Which of the following should be used as an explant to generate a disease free plant ?
(a) Anther
(b) Ovary cell
(c) Shoot tip
(d) Young embryo
Answer:
(c) Shoot tip

Question 58.
Hormone responsible for growth of the root in micropropagation is
(a) auxin
(b) gibberellin
(c) cytokinin
(d) abscisic acid
Answer:
(b) gibberellin

Question 59.
somaclones are
(a) somatic hybrids
(b) genetically identical to the original plant
(c) used to recover disease free plants
(d) sterile plants
Answer:
(d) sterile plants

Question 60.
Meristem culture is used
(a) to produce disease free plants
(b) in germplasm conservation
(c) in rapid clonal multiplication
(d) all of these
Answer:
(d) all of these

Question 61.
Meristem culture is the cultue of
(a) axillary or apical shoot meristems
(b) anthers
(c) plant seeds
(d) young embryos
Answer:
(a) axillary or apical shoot meristems

Question 62.
A plant cell without cell wall is called
(a) proplast
(b) protoplast
(c) nucleoplasm
(d) explant
Answer:
(b) protoplast

Question 63.
A somatic hybird between potato and tomato is named as
(a) bomato
(b) mopato
(c) pomato
(d) topamo
Answer:
(c) pomato

Question 64.
The enzymes required to obtain protoplast from a plant cell are
(a) cellulase
(b) chitinase
(c) pectinase
(d) both (a) and (c)
Answer:
(d) both (a) and (c)

Question 65.
The chances of contracting bird flu from a properly cooked (above 100°C) chicken and egg are
(a) very high
(b) high
(c) moderate
(d) none
Answer:
(d) none

Question 66.
A group of animals which are related by descent and share many similarities are referred to as
(a) breed
(b) race
(c) variety
(d) species
Answer:
(a) breed

Question 67.
Inbreeding is carried out in animal husbandry because it
(a) increases vigour
(b) improves the breed
(c) increases heterozygosity
(d) increases homozygosity
Answer:
(d) increases homozygosity

Question 68.
Sonalikea and Kalyan Sona are varieties of
(a) wheat
(b) rice
(c) millet
(d) tobacco
Answer:
(a) wheat

Question 69.
Which one of the following is not a fungal disease ?
(a) Rust of wheat
(b) Smut of Bajra
(c) Black rot of crucifers
(d) Red rot of sugarcane
Answer:
(c) Black rot of crucifers

Question 70.
Fungicides and antibiotics are chemicals that
(a) enhance yield and disease resistance
(b) kill pathogenic fungi and bacteria, respectively
(c) kill all pathogenic microbes
(d) kill pathogenic bacteria and fungi respectively
Answer:
(b) kill pathogenic fungi and bacteria, respectively

Question 71.
Use of certain chemicals and radiation to change the base sequences of genes of crop plants is termed
(a) recombinant DNA technology
(b) transgenic mechanism
(c) mutation breeding
(d) gene therapy
Answer:
(c) mutation breeding

Question 72.
The scientific process by which crop plants are enriched with certain desirable nutrients is called
(a) crop protection
(b) breeding
(c) bio-fortification
(d) bio-remediation
Answer:
(c) bio-fortification

Question 73.
The term ‘totipotency’ refers to the capacity of a
(a) cell to generate whole plant
(b) bud to generate whole plant
(c) seed to germinate
(d) cell to enlarge in size
Answer:
(a) cell to generate whole plant

Question 74.
An explant is
(a) dead plant
(b) part of the plant
(c) part of the plant used in tissue culture
(d) part of the plant that expresses a specific gene
Answer:
(c) part of the plant used in tissue culture

Question 75.
The biggest constraint of plant breeding is
(a) availability of desirable gene in the crop and its wild relatives
(b) infrastructure
(c) trained manpower
(d) transfer of genes from unrelated sources
Answer:
(a) availability of desirable gene in the crop and its wild relatives

Question 76.
Lysine and tryptophan are
(a) proteins
(b) non-essential amino acids
(c) essential amino acids
(d) aromatic amino acids
Answer:
(c) essential amino acids

Question 77.
Micropropagation is
(a) propagation oif microbes in vitro
(b) propagation of plants in vitro
(c) propagation of cells in vitro
(d) growing plants on smaller scale
Answer:
(b) propagation of plants in vitro

Question 78.
Protoplast is
(a) another name for protoplasm
(b) an animal cell
(c) a plant cell without a cell wall
(d) a plant cell
Answer:
(c) a plant cell without a cell wall

Question 79.
To isolate protoplast, one needs
(a) pectiriase
(b) cellulase
(c) both pectinase and cellulase
(d) chitinase
Answer:
(c) both pectinase and cellulase

Question 80.
Which one of the following is a marine fish ?
(a) Rohu
(b) Hilsa
(c) Catla
(d) Common Carp
Answer:
(b) Hilsa

Question 81.
Which one of the following products of apiculture is used in cosmetics and polishes ?
(a) Honey
(b) Oil
(c) Wax
(d) Royal jelly
Answer:
(c) Wax

Question 82.
More than 70 percent of livestock population is in
(a) Denmark
(b) India
(c) China
(d) India and China
Answer:
(d) India and China

Question 83.
The agriculture sector of India employs about
(a) 50 percent of the population
(b) 70 percent of the population
(c) 30 percent of the population
(d) 60 percent of the population
Answer:
(d) 60 percent of the population

Question 84.
33 percent of India’s (Gross Domestic Product) comes from
(a) industry
(b) agriculture
(c) export
(d) small-scale cottage industries
Answer:
(b) agriculture

Question 85.
A collection of all the alleles of all the genes of a crop plant is called
(a) germplasm collection
(b) protoplasm collection
(c) herbarium
(d) somaclonal collection
Answer:
(a) germplasm collection