CBSE Class 12 Biology Strategies for Enhancement in Food Production Assignment Set B

Question: …… is the agricultural practice of feeding, breeding and raising livestock. Choose the most appropriate word to fill
in the blank.
a) Animal husbandry
b) Cattle improvement
c) Both (a) and (b)
d) Cattle farming

Answer: a

Question: The process of fusion of protoplast of somatic cells obtained from different varieties or species of plant on a suitable
nutrient medium in vitro to develop a somatic hybrid is called
a) somatic hybridisation
b) cross hybridisation
c) intravarietal hybridisation
d) interspecific hybridisation

Answer: a

Question: Crustacean fishery is connected with exploitation of
a) oysters and crabs
b) mussels and squids
c) shell and cuttle fish
d) crabs and prawn

Answer: d

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: Choose the correct option.
a) More than 70% of the world livestock population is in India and China
b) The contribution of India and china to the world farm produce is about 25%
c) Important livestock of India are cattle and buffaloes
d) All of the above

Answer: d

Question: What measures should be taken for cattles, to realise the yield potential?
a) They have to be housed well
b) Feeding should be in scientific manner
c) Hygienic milking, storage and transport of milk
d) All of the above

Answer: d

Question: Which of the following is an aim of animal breeding?
a) Increasing the yield of animals
b) Improving the desirable qualities of the produce
c) Producing better looking animals
d) Both (a) and (b)

Answer: d

Question: The term ‘inbreeding’ refers to
a) mating of more closely related individuals within the same breed for 4-6 generations
b) mating of unrelated animals of the same breed
c) mating of animals within the same breed, but having no common ancestors up to 4-6 generations
d) superior males of one breed are mated with superior females of another breed

Answer: a

Question: A superior female, in the case of cattle is the …A… that produces more milk per lactation. On the other hand, a superior male is the …B…, which gives rise to …C… as compared to those of other males. Here, A to C refers to
a) A–cow, B–bull, C–superior progeny
b) A–buffalo, B–bull, C–inferior progeny
c) A–cow, B–bull, C–inferior progeny
d) A–cow, B–bull, C–normal progeny

Answer: a

Question: Suggest a way to overcome inbreeding depression.
a) Selected animals should be mated with related superior animals of different breed
b) Selected animals should be mated with unrelated superior animals of same breed
c) Selected animals should be mated with related superior animals of same breed
d) Selected animals should be mated with unrelated superior animals of different breed

Answer: b

Question: The practices concerned with the improvement in animal husbandry include
a) management of farm and farm animals
b) management of animals and plants at a same place
c) genetic engineering
d) None of the above

Answer: a

Question: When breeding is between the unrelated animals, including individuals of the same breed but having no common ancestors for 4-6 generations or between different breeds or different species, is called
a) outbreeding
b) inbreeding
c) controlled breeding
d) hybridisation

Answer: a

Question: During MOET at which of the following stages, embryo is transferred to surrogate mothers
a) Unfertilised ovules
b) 2-celled stage
c) Fertilised egg
d) 8-32 celled stage

Answer: d

Question: The technique of regeneration of whole plant from any part of a plant by allowing it to grow on a suitable culture under aseptic sterile conditions in vitro is called
a) tissue culture
b) plant culture
c) micropropagation
d) somatic hybridisation

Answer: a

Question: In which of the following techniques high milk giving breeds of females and high quality meat giving bulls have been bred successfully to increase herd size short time?
a) MOET
b) Artificial insemination
c) Interspecific hybridisation
d) Induced mutation

Answer: a

Question: Controlled breeding experiments are carried out using
a) interspecific hybridisation
b) artificial insemination
c) outcrossing
d) intraspecific hybridisation

Answer: b

Question: Which of the following given point is important for successful bee-keeping?
a) Knowledge of the nature and habits of bees
b) Selection of suitable location for keeping the beehives
c) Catching and hiving of swarms (group of bees) and their management during different seasons
d) All of the above

Answer: d

Question: Green revolution in India was possible due to
a) exploitation of high yielding varieties
b) intensive cultivation
c) better irrigation, fertilisers and pesticide facilities
d) All of the above

Answer: d

Question: In case of plant breeding, cross hybridisation is a time consuming and tedious process because
a) pre-existing genetic variability is collected from wild varieties, species and relatives of the cultivated crop species
b) it involves the selection of plants among the progeny of the hybrids with desired combination of characters
c) it involves emasculation and bagging techniques to transfer desired pollen grains to the stigma of desired plant
d) None of the above

Answer: c

Question: Which of the following is not a freshwater fishes?
a) catla
b) rohu
c) common carp
d) mackerel

Answer: d

Question: During selection and testing of superior recombinants, selected superior plants are self-pollinated for several generation. Why?
a) So that they reach a state of uniformity (homozygosity)
b) So that the characters will not segregate in the progeny
c) Both (a) and (b)
d) Selected superior plants are not self-pollinated but cross-pollinated

Answer: c

Question: Where Taichung Native-1 was developed?
a) Taraiva
b) Tokyo
c) Tallinn
d) Taiwan

Answer: d

Question: Which of the following points should be kept into consideration for management of poultry farm?
A. Selection of disease free and suitable breeds
B. Proper and safe farm conditions
C. Proper feed and water
D. Hygiene and healthcare
a) A,B,C
b) A,C,D
c) A,B,C,D
d) None of these

Answer: c

Question: Saccharum barberi and Saccharum officinarum are varieties of
a) sugarcane
b) maize
c) wheat
d) rice

Answer: a

Question: Method(s) of breeding plants for acquiring disease resistance is/are
a) conventional breeding techniques
b) mutation breeding
c) tissue culture
d) Both (a) and (b)

Answer: d

Question: The process by which genetic variations are created through changes in the base sequences within genes is
a) plant breeding
b) interspecific hybridisation
c) outcrossing
d) mutation

Answer: d

Question: To meet the demands of the society, in vitro production of a large number of plantlets in a short duration is practiced in floriculture and horticulture industry today. It is called
a) somatic hybridisation
b) micropropagation
c) hybridoma technology
d) somaclonal variation

Answer: b

27. Some released crop varieties bred by hybridisation and selection, for insect pest resistance are given in the table.
Fill up the blanks.

Crops                       Varieties                              Insect pests

Brassica                   A                                          Aphids

B                          Pusa Sem 2, Pusa Sem-3      Jassids, aphids and fruit                                                                                 borer

C                      Pusa Sawani, Pusa A-4              Shoot and fruit borer

a) A–Pusa Karan, B–Flat bean, C–Bhindi
b) A–Pusa Gaurav, B–Flat bean, C–Okra
c) A–Pusa Shubhra, B–Wrinkled bean, C–Pea
d) A–Pusa Komal, B–Smooth bean, C–Bhindi

Answer: b

Question: Hidden hunger is best indicated as
a) inability of majority of people to buy enough fruits, vegetables, legumes, fish and meat and thus suffer from deficiency of vitamin, protein, etc.
b) people are unable to buy healthy drink item and thus suffer from deficiency
c) people are unable to buy junk food thus suffer from deficiency
d) All of the above

Answer: a

Question: Semidwarf variety of wheat was developed at
a) International Centre for Wheat and Maize Improvement Brazil
b) International Centre for Wheat and Maize Improvement Mexico
c) International Centre for Wheat and Rice Improvement Japan
d) International Centre for Wheat and Gram Improvement Mexico

Answer: b

Question: Single cell protein is an alternative protein source for animal and human nutrition formed from certain beneficial microorganisms like
a) Spirulina
b) Methylophilus methylotrophus
c) Both (a) and (b)
d) None of the above

Answer: c

Question: Somatic hybrids are produced by the fusion of …… .
a) protoplasts of two cells
b) cytoplasm of two cells
c) nucleus of two cells
d) DNA of two cells

Answer: a

Question: Pomato is a somatic hybrid of
a) potato and onion
b) potato and tomato
c) potato and brinjal
d) brinjal and tomato

Answer: b

Point to Remwmber

Apiculture : Rearing of honeybees for the production of honey, beewax, royal jelly and bee Venom.

Artificial insemination : Introduction of semen of good quality of male into the vagina of female.

Explant : A part of plant excised from its original location and used for tissue culture.

Germplasm Collection : The entire collection having all the diverse alleles for all the genes in the given organism.

Inbreeding depression : Continued close inbreeding decreases the fertility and productivity.

Inbreeding : Inbreeding refers to the mating of more closely related individuals within the same breed for 4-6 generations.

Out-breeding : Out-breeding is the breeding of the unrelated animals, which may be between individuals of the same breed (but having no common
ancestors), or between different breeds (cross breeding or different species (interspecific hybridisation).

Super Ovulation : Stimulation of good female animal by administering hormones to produce more eggs.

Mutation breeding : Mutation in plants in induced artificially through use of mutagens to obtain desirable characters. These plants (as a source) are used
in breeding.

Totipotency : The ability to generate a whole plant from any cell/explant.

Important Questions for NCERT Class 12 Biology Strategies for Enhancement in Food Production

 

I. ANIMAL HUSBANDARY