Strategies for Enhancement in Food Production MCQs
Class XII Biology
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NEET Practice
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100 questions in this chapter
Question 81 of 100
📘 CLASS XII
Evaluate how homozygous purelines are developed in livestock:
I. Developing cattle purelines relies on increasing heterozygosity through cross-breeding. II. Inbreeding increases homozygosity, which is necessary to evolve a pureline. III. Inbreeding exposes harmful recessive genes that can then be eliminated by selection. IV. Selection at each step increases the productivity of the inbred population.
Choose the correct option.
Pureline development depends on inbreeding, which increases homozygosity. It exposes harmful recessive genes that can be eliminated by selection, while repeated selection accumulates superior genes and improves the productivity of the inbred population. Statement I is incorrect because cross-breeding increases heterozygosity rather than producing purelines.
Question 82 of 100
📘 CLASS XII
Regarding cross-breeding and the development of Hisardale:
I. Cross-breeding involves mating superior males of one breed with superior females of another breed. II. Progeny hybrid animals from cross-breeding cannot be used directly for commercial production. III. Hisardale is a new breed of sheep developed in Punjab. IV. Hisardale was developed by crossing Bikaneri ewes and Marino rams.
Choose the correct statements.
Cross-breeding involves mating superior males of one breed with superior females of another breed. Hybrid progeny can be directly used for commercial production, making Statement II incorrect. Hisardale is a sheep breed developed in Punjab by crossing Bikaneri ewes with Marino rams.
Question 83 of 100
📘 CLASS XII
Analyse the hormonal and recovery stages of the Multiple Ovulation Embryo Transfer (MOET) program:
I. The cow is administered hormones with FSH-like activity to induce superovulation. II. Instead of the normal single egg, the cow produces 6–8 eggs per cycle. III. Fertilised eggs are recovered non-surgically at the 8–32 cell stage. IV. Once the embryos are transferred to surrogates, the genetic mother is pregnant and unavailable for further cycles.
Select the correct statements.
MOET uses hormones with FSH-like activity to induce superovulation, resulting in about 6–8 eggs per cycle instead of one. Fertilised embryos are recovered non-surgically at the 8–32 cell stage and transferred to surrogate mothers. Since the embryos are carried by surrogates, the genetic mother is immediately available for another round of superovulation. Hence Statement IV is incorrect.
Question 84 of 100
📘 CLASS XII
Evaluate the characteristics of interspecific hybridisation and artificial insemination:
I. Interspecific hybridisation involves mating males and females of two different related species. II. The progeny of interspecific hybridisation can never combine desirable features of both parents. III. A mule is a successful hybrid of economic value produced via interspecific hybridisation. IV. Artificial insemination allows semen to be frozen and transported to overcome normal mating barriers.
Choose the correct statements.
Interspecific hybridisation involves mating animals belonging to two different related species. Such hybrids, for example the mule, may combine desirable traits of both parents and have considerable economic value. Artificial insemination permits semen to be frozen, stored and transported, thereby overcoming many limitations of natural mating. Statement II is incorrect.
Question 85 of 100
📘 CLASS XII
Analyse the conditions that determine milk yield and quality in dairy farms:
I. Milk yield is primarily dependent on the quality of breeds on the farm. II. High-yielding potential must be combined with disease resistance and local climatic adaptability. III. Modern mechanisation of milking and storage increases human contact with milk. IV. Cleanliness and hygiene of both cattle and handlers are crucial during milking, storage, and transport.
Which of the statements are correct?
Milk yield largely depends on breed quality. Selection should consider disease resistance and adaptability to local climatic conditions. Hygiene of both cattle and handlers is essential throughout milking, storage and transport. Mechanisation reduces, rather than increases, direct human contact with milk. Hence Statement III is incorrect.
Question 86 of 100
📘 CLASS XII
Identify the core features of poultry farm management:
I. Poultry includes chicken, ducks, and sometimes turkeys and geese. II. The word poultry is strictly limited to referring only to egg production. III. Important components include selection of disease-free breeds, proper feed, water, and hygiene. IV. Bird flu virus is a well-known pathogen that created a major scare and affected consumption.
Choose the correct option.
Poultry includes chicken, ducks and, in some cases, turkeys and geese raised for eggs and meat. Proper breed selection, feed, water, hygiene and healthcare are essential. Bird flu is a viral disease that greatly affected poultry consumption. Statement II is incorrect because poultry is not restricted only to egg production.
Question 87 of 100
📘 CLASS XII
Evaluate the requirements for successful apiculture (bee-keeping):
I.Apis indica is the most common honeybee species reared in India. II. Beehives must only be kept in wild forests and can never be kept in courtyards or roofs. III. Bee-keeping is relatively easy and is not highly labor-intensive. IV. Successful bee-keeping requires specialized knowledge of the nature and habits of bees.
Select the correct statements.
Apis indica is the most commonly reared honeybee species in India. Bee-keeping is comparatively easy and is not highly labour-intensive. It requires knowledge of bee habits, swarm management and hive maintenance. Hives can be maintained in courtyards, verandahs or on rooftops, making Statement II incorrect.
Question 88 of 100
📘 CLASS XII
Analyse the relationship between bee pastures and agricultural yields:
I. Bee-keeping requires pastures of wild shrubs, fruit orchards, and cultivated crops. II. Keeping beehives in fields during the flowering period increases pollination efficiency. III. Honeybees are important pollinators of sunflower, Brassica, apple, and pear. IV. Beehives in fields improve crop yield but cause a dramatic decrease in honey yield.
Which of these statements are correct?
Bee-keeping requires suitable bee pastures such as wild shrubs, fruit orchards and cultivated crops. Keeping beehives in flowering crop fields increases pollination efficiency and improves both crop yield and honey yield. Statement IV is incorrect because honey production also increases.
Question 89 of 100
📘 CLASS XII
Analyze the classification of popular Indian food fishes:
I. Catla, Rohu, and common carp are very common freshwater fishes. II. Hilsa, Sardines, Mackerel, and Pomfrets are popular marine fishes. III. Common carp and Rohu are marine species harvested in deep-sea trawlers. IV. Pomfrets and Sardines are cultured strictly in inland freshwater ponds.
Select the correct statements.
Catla, Rohu and common carp are freshwater fishes, whereas Hilsa, Sardines, Mackerel and Pomfrets are marine fishes. Statements III and IV incorrectly reverse their habitats.
Question 90 of 100
📘 CLASS XII
Regarding the development and expansion of fisheries:
I. Fisheries provide livelihood and income to millions of fishermen, especially in coastal states. II. Pisciculture is the technique used to increase the production of only aquatic plants. III. Aquaculture and pisciculture increase production of aquatic plants and animals in both freshwater and marine habitats. IV. The flourish of the fishery industry has led to the "Blue Revolution".
Choose the correct option representing correct statements.
Fisheries provide employment and income, particularly in coastal regions. Aquaculture and pisciculture enhance the production of aquatic organisms in freshwater and marine environments, leading to the Blue Revolution. Statement II is incorrect because pisciculture specifically refers to fish farming.