All Free Agriculture MCQs with Answers
Every Agriculture question in the bank, across all chapters, each with the correct answer and a written explanation. Free and unlimited, with no account needed.
2,315 questions · page 80 of 116
- A. CIP Peru
- B. Florida
- C. Columbia
- D. None of the above
Explanation: The International Potato Center, or CIP, in Peru maintains the major global potato germplasm collection.
Correct answer: CIP Peru- A. 200 years
- B. 150 years
- C. 100 years
- D. 1250 years
Explanation: Under suitable long-term gene-bank conditions, germplasm is commonly described in standard texts as being storable for about 100 years.
Correct answer: 100 years- A. China
- B. Mexico
- C. IRRI Philippines
- D. None of the above
Explanation: The International Rice Research Institute at Los Baños, Philippines, maintains the world’s major rice germplasm collection.
Correct answer: IRRI Philippines- A. 980
- B. 1080
- C. 1200
- D. 1100
Explanation: Older agricultural genetics references commonly report approximately 980 crop gene banks worldwide.
Correct answer: 980- A. Morgan
- B. Mather
- C. Shull and East
- D. None of the above
Explanation: Mather introduced the concept of disruptive selection, in which selection favours extreme phenotypes over intermediate ones.
Correct answer: Mather- A. Barley
- B. wheat
- C. Maize
- D. None of the above
Explanation: Shull and East proposed the overdominance explanation of heterosis in maize in 1908.
Correct answer: Maize- A. Grow put test
- B. Ageing test
- C. Test of genetic purity of seeds
- D. Tz test
Explanation: The tetrazolium (TZ) test stains living embryos, so stain intensity provides a rapid estimate of seed viability that generally correlates…
Correct answer: Tz test- A. Kittock and Law (1969)
- B. Woodstock (1976)
- C. Maguire (1962)
- D. Nicolls & Heu Decker (1968)
Explanation: Kittock and Law described estimating seed vigor from the intensity of staining produced in the tetrazolium test.
Correct answer: Kittock and Law (1969)- A. 100 plants
- B. 200 plants
- C. 300 plants
- D. 400 plantsDownload Nature Guides
Explanation: For maintaining a self-pollinated commercial variety, Oka suggested a population of about 300 plants for maintenance and seed production.
Correct answer: 300 plants- A. Hybrid
- B. Mutagens
- C. Strange organisms
- D. Transgenic organisms
Explanation: A transgenic organism carries a gene introduced through genetic engineering, often from another species.
Correct answer: Transgenic organisms- A. All the above
- B. Provide greater vigour
- C. Are more uniform
- D. Produce better crop
Explanation: Hybrids are produced to combine desirable parental traits, especially hybrid vigour, higher performance and greater uniformity in the…
Correct answer: All the above- A. Blended variety
- B. Exotic variety
- C. Pure line variety
- D. Hybrid variety
Explanation: An exotic variety is introduced from another country or region and may be recommended directly for commercial cultivation.
Correct answer: Exotic variety- A. Abiotic resistance
- B. Vertical resistance
- C. Biotic resistance
- D. Horizantal resistance
Explanation: Biotic resistance is resistance against living agents such as insects, fungi, bacteria, viruses or nematodes.
Correct answer: Biotic resistance- A. 5 Meters
- B. 4 Meters
- C. 3 Meters
- D. 2 Meters
Explanation: Wheat is largely self-pollinated, so only a small isolation distance is needed to prevent mechanical mixing or occasional outcrossing; the…
Correct answer: 3 Meters1595. In Sunflower, production of foundation seed requires as isolation distance of__________________?
- A. 400 meters
- B. 800 meters
- C. 200 meters
- D. 100 meters
Explanation: Sunflower foundation seed requires a 400-metre isolation distance because sunflower is mainly cross-pollinated and unwanted pollen can…
Correct answer: 400 meters- A. 100 meters
- B. 50 meters
- C. 200 meters
- D. 3 meters
Explanation: Bhindi, or okra, is cross-pollinated to a significant extent, so foundation seed production requires 200 metres of isolation from other…
Correct answer: 200 meters- A. G. herbaceum and G. raimondii
- B. G. arborieum and G. raimondii
- C. G. hirsutum and G. raimondii
Explanation: Gossypium barbadense is an allotetraploid cotton traditionally described in agricultural texts as originating from an A-genome cotton…
Correct answer: G. herbaceum and G. raimondii- A. Hexaploid
- B. Diploid
- C. Triploid
- D. Tetraploid
Explanation: Gossypium hirsutum, the upland cotton species, is an allotetraploid with 2n = 52 chromosomes. Diploid cotton species include G.
Correct answer: Tetraploid- A. Grow out test
- B. Ageing test
- C. Tz test
- D. All the above
Explanation: A grow-out test determines genetic purity by raising seed plants and comparing their characters with the prescribed varietal description.
Correct answer: Grow out test- A. Germ (1949)
- B. Kotowski (1926)
- C. Deloucle & Baskin (1972)
- D. Moore (1973)
Explanation: Kotowski proposed the coefficient of velocity of germination in 1926, expressing germination speed from the number of seeds germinated…
Correct answer: Kotowski (1926)