Important Questions for Class 12 Biology 9th Chapter Stratergies for Enhancement in Food Production MCQ, Very Short, Short Type, Long Type
CBSE Class 12 Important Questions for Class 12 Biology Chapter 9 Stratergies for Enhancement in Food Production all MCQ Type, Very Short Type, Assertion Reason Type, Case Study, Short Type and Long Type Questions with Answers by Expert. Important Questions for Section A, B, C, D Class 12 Biology Chapter 9.
MCQS
(1) Assertion: Inbreeding is necessary if we want to evolve a pure line in any animal
Reason: Inbreeding increases homozygosity leading to development of pure lines.
a.) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
b.) Both Assertion and Reason are correct and Reason is not the correct explanation for Assertion.
c.) If assertion is true but the reason is false.
d.) If both assertion and reason are false.
(2) Assertion: When breeding is between animals of the same breed it is called inbreeding, while crosses between different breeds are called outbreeding
Reason: Animal breeding aims at increasing the yield of animals and improving the desirable qualities of the produce.
a.) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
b.) Both Assertion and Reason are correct and Reason is not the correct explanation for Assertion.
c.) If assertion is true but the reason is false.
d.) If both assertion and reason are false.
(3) The mating of more closely related individuals within the same breed for 4- 6 generations is called as
(a) Outcross
(b) Inbreeding
(c) Outbreeding
(d) Crossbreeding
(4) Which of the following is essential nutrient?
(a) Iron
(b) Iodine
(c) Zinc
(d) All of the above
(5)Induce mutations artificially through use of chemicals or radiations and selecting and using the plants that have the desirable character as a source in called
(a) Mutation breeding
(b) Out breeding
(c) In breeding
(d) Germplasm collection
(6) Assertion: Milk yield is primarily dependent on the quality of breeds in thefarm
Reason: Care of animals doesn’t play an important in improving the yield of milk
a.) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
b.) Both Assertion and Reason are correct and Reason is not the correct explanation for Assertion.
c.) If assertion is true but the reason is false.
d.) If both assertion and reason are false
(7) Assertion: A Superior male from one breed mate with superior females from another.
Reason: this is known as Cross-breeding
a.) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
b.) Both Assertion and Reason are correct and Reason is not the correct explanation for Assertion.
c.) If assertion is true but the reason is false.
d.) If both assertion and reason are false
(8) Sonalika and Kalyan Sona, which are high yielding anddisease resistant varieties of
(a) Wheat
(b) Rice
(c) Maize
(d) Sugar cane
(9) Black rot of crucifers is caused by
(a) virus
(b) bacteria
(c) fungus
(d) all the above
(10) Arrange in the steps of tissue culture in correct order
(a) screening germplasmfor resistance sources, hybridization of selected parents, selection andevaluation of the hybrids and testing and release of new varieties
(b) hybridization of selected parents, screening germplasm for resistance sources, selection andevaluation of the hybrids and testing and release of new varieties
(c) selection andevaluation of the hybridsscreening germplasm for resistance sources, hybridization of selected parents, and testing and release of new varieties
(d) testing and release of new varieties,hybridization of selected parents,screening germplasm for resistance sources, selection andevaluation of the hybrids and
Answer in one sentence
(1) State the difference between inbreeding and out breeding.
Ans. Inbreeding occurs when animals of the same procreate breed together, whereas outbreeding occurs when animals of different breeds cross.
(2) What can be a solution for the problem of inbreeding depression?
Ans. Animals from the breeding population should be paired with superior animals of the same breed who are unrelated. This usually aids in the restoration of fertility and yield.
(3) What is totipotency?
Ans. Explants, or any component of a plant when removed and cultured in a test tube under sterile circumstances in particular all nutrients media are provided, could be used to regenerate complete aplant. Hence, totipotency refers to the ability to grow a full plant from a single cell or explant.
(4) What are the important components of nutrient medium required for successful tissue culture?
Ans. A carbon source, such as sucrose, as well as inorganic salts, vitamins, amino acids, and growth regulators, such as auxins and cytokinin, must be included in the nutritional medium used for tissue culture.
(5) Define: Biofortification.
Ans. The most practical way to improve public health is through biofortification, which involves producing crops with better levels of vitamins and minerals, or more protein and healthier fats.
(6) Explain the term breed.
Ans. A breed is a collection of animals that are connected by descent and share most characteristics such as overall look, features, size, configuration, and so on.
(7) What is germplasm collection?
Ans. Germplasm collection refers to the full collection (of plants/seeds) that contains all of the various alleles for all genes in a certain crop.
- Answer in short
Q.1) Describe Poultry Farm Management practices?
Ans. 1.) Poultry refers to a group of domesticated fowl (birds) raised for food or eggs.
2.) Chicken and ducks are common, with turkey and geese thrown in for good measure.
3.) The term poultry is frequently used to refer to the meat of solely these species, although it can also apply to the flesh of other birds in a broader sense.
4.) Poultry farm management includes disease-free and adequate breed selection, proper and safe farm conditions, proper feed and water, hygiene, and health care.
Q.2) What is somatic hybridization?
Ans. 1.) Isolated protoplasts from two different plant kinds – each with a desirable trait – can be fused to produce hybrid protoplasts, which can then be cultivated to produce a new plant.
2.) These hybrids are known as somatic hybrids, and the process of creating them is known as somatic hybridization.
Q.3) What is Out-crossing?
Ans. 1.) Out-crossing is the practice of mating animals from the same breed with no common ancestors on either side of their ancestry for up to 4-6 generations.
2.) An out-cross is the result of a mating like this.
3.) It is the ideal breeding approach for animals with below-average milk output, growth rate in beef cattle, and other traits.
4.) Inbreeding depression is frequently alleviated by a single outcross.
Q.4) Describe the Fisheries industry in brief.
Ans. 1.) Fisheries is the enterprise of catching, processing, and selling fish, shellfish, and other aquatic animals.
2.) Fish, fish products, and other aquatic species such as prawns, crabs, lobsters, edible oysters, and other aquatic animals provide sustenance for a major portion of our population.
3.) Catla, Rohu, and common carp are some of the most prevalent freshwater fishes.
4.) Hilsa, Sardines, Mackerel, and Pomfrets are some of the marine fishes consumed.
- Answer in brief
Q.1) What are important process for success of beekeeping?
Ans. The following considerations are critical for beekeeping success:
- Understanding the nature and behaviors of bees,
- Choosing a good area for raising beehives,
- Catching and hiving of swarms (groups of bees),
- Beehive management during different seasons, and
- Honey and beeswax handling and collection
- Many of our crop species, such as sunflower, Brassica, apple, and pear, are pollinated by bees.
- Keeping beehives in crop fields throughout the flowering season boosts pollination efficiency and production, which is helpful for both crop yield and honey yield.
Q.2) Describe how Single Cell Protein are used for commercially.
Ans. 1.) Single Cell Protein is an alternative source of protein for animal and human nutrition (SCP).
2.) Microbes are being used commercially for producing a source of high-quality protein.
3.) Spirulina, a blue-green algae, can be easily produced in huge quantities on materials such as waste water from potato processing facilities (which contains starch), straw, molasses, animal dung, and even sewage, and can serve as a diet rich in protein, minerals, lipids, carbs, and vitamins. In addition, such use minimizes pollutants in the environment.
4.) Because of its high rate of biomass generation and growth, certain bacterial species, such as Methylophilus methylotrophus, can be produce upto 25 tons of protein.
5.) Many people consume edible mushrooms, and large-scale mushroom cultivation is a developing industry, so it’s reasonable to believe that microscopic fungi will become accepted as food as well.
Q.3) Explain the process of Cross-breeding in detail
Ans. 1.) This strategy involves mating superior males from one breed with superior females from another breed.
2.) The good traits of two different breeds can be merged through cross-breeding.
3.) The hybrid animals’ offspring may be exploited for commercial purposes.
4.) Alternatively, they could be exposed to inbreeding and selection in order to create new stable breeds that are superior to the existing ones.
5.) This method has resulted in the development of numerous new animal breeds.
6.) Bikaneri ewes and Marino rams were crossed to create the Hisardale sheep breed, which was established in Punjab.
Q.4) State the Economic importance of Fisheries in India
Ans. 1.) The business of catching, processing, and selling fish, shellfish, and other aquatic animals is known as fishing.
2.) For a large section of our population, fish, fish products, and other aquatic species such as prawns, crabs, lobsters, edible oysters, and other aquatic animals supply nutrition.
3.) Freshwater fish such as catla, rohu, and common carp are some of the most frequent.
4.) Some of the marine species eaten are Hilsa, Sardines, Mackerel, and Pomfrets.
5.) This has resulted in the development and flourishing of the fisheries industry, which has provided a significant amount of cash to both farmers and the country as a whole.
Q.5) Give detailed description of dairy farm management practices.
Ans. 1.) Dairy farming is the practice of raising animals for the purpose of producing milk and other dairy products for human consumption.
2.) Dairy farm management is concerned with the processes and methods that boost in production of milk yield and quality.
3.) The quality of the farm’s breeds has the greatest impact on milk yield. It is critical to select good breeds with high yielding potential (under the climatic circumstances of the area) and disease resistance.
4.) The cattle must be adequately cared for in order for the yield potential to be realized — they must be well housed, have appropriate water, and be disease free.
5.) Cattle should be fed in a scientific manner, with specific attention paid to the quality and quantity of forage.
6.) Furthermore, while milking, storing, and transporting milk and its products, strict cleanliness and hygiene (both of the animals and the workers) are critical.
7.) many of these steps are now automated, reducing the chance of direct interaction between the fruit and the handler.