Answer: Crossbreeding combines the high milk yield traits of exotic breeds with the disease resistance, heat tolerance, and adaptability of indigenous breeds.
- A Purebred exotic cattle breeds alone consistently provide the absolute maximum milk yield under every possible climatic condition as widely reported
- B Crossbreeding combines the high milk yield traits of exotic breeds with the disease resistance, heat tolerance, and adaptability of indigenous breeds
- C Purebred indigenous cattle breeds actually produce considerably more milk than exotic breeds do under typical tropical farming conditions in standard practice
- D Crossbreeding programs are undertaken mainly and primarily to produce drought-resistant draft animals suited for heavy farm labor under most conditions encountered
Correct answer: B. Crossbreeding combines the high milk yield traits of exotic breeds with the disease resistance, heat tolerance, and adaptability of indigenous breeds
Explanation: Exotic breeds like Friesian and Jersey have high milk yield but are poorly adapted to tropical diseases and climate. Indian breeds like Sahiwal are well-adapted but produce less milk. Crossbreeding combines high yield with adaptability and disease resistance.
Different fish species occupy different feeding depths in the same pond without competing for food: Catla feeds near the surface, Rohu in the middle zone, and Mrigal or common carp at the bottom - letting a single pond support far more total fish than one species alone.
Concept context
Learn about animal husbandry, plant breeding, tissue culture, biofortification, and single cell protein.
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