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 77 of 116
- A. Brim (1966)
- B. Simmonds (1979)
- C. Giber (1953)
- D. Goulden (1939)
Explanation: Goulden first suggested single-seed descent in 1939, a method that advances one seed from each plant generation after generation to…
Correct answer: Goulden (1939)- A. All the above
- B. Multi lines
- C. Pure lines
- D. Inbreed lines
Explanation: Inbred lines and pure lines are homozygous, while a multiline is a mixture of several genetically distinct but individually homozygous…
Correct answer: All the above- A. Hetrozygosity
- B. Homogeneity
- C. Homozygosity
- D. All the above
Explanation: Prepotency is the ability of a parent to transmit its traits consistently to offspring, and this increases as homozygosity increases.
Correct answer: Homozygosity- A. Wheat
- B. Sorghum
- C. Barley
- D. Maize
Explanation: Maize is protandrous: its anthers shed pollen before the female stigma becomes receptive, which promotes cross-pollination.
Correct answer: Maize- A. Jones and Davies (1944)
- B. Devaries and Correns (1900)
- C. Bruce and Keeble (1908)
- D. Nilson (1900)
Explanation: Jones and Davis reported cytoplasmic male sterility in onion in 1944, establishing the practical basis for using CMS in hybrid-seed…
Correct answer: Jones and Davies (1944)- A. Allelic genes
- B. nuclear genes
- C. Non alleleic genes
- D. All the above
Explanation: Genetic male sterility is governed by nuclear genes, commonly a recessive allele at a nuclear locus, unlike cytoplasmic male sterility…
Correct answer: nuclear genes- A. 10.00 am
- B. 5.20 pm
- C. 1.15 pm
- D. 7.00 am
Explanation: In wheat, anthesis is commonly recorded as beginning at about 1:15 p.m. under the standard crop-physiology reference used in such MCQs.
Correct answer: 1.15 pm- A. Six stamens
- B. Eight stamens
- C. Four stamens
- D. None of the above
Explanation: A rice flower has six stamens, even though grasses often appear to have reduced floral parts.
Correct answer: Six stamens- A. Papaya
- B. All the above
- C. Hemp
- D. Datepalm
Explanation: Papaya, date palm, and hemp are dioecious, meaning male and female flowers occur on separate plants.
Correct answer: All the above1530. Self incompatibility which is controlled by single gene found in some species of__________________?
- A. Cruciferae
- B. Solanaceae
- C. All the above
- D. Leguminosae
Explanation: Single-locus, multiple-allele self-incompatibility systems occur in several families, including Cruciferae, Solanaceae, and some…
Correct answer: All the above- A. CGMS
- B. CMS
- C. GMS
- D. all the above
Explanation: When pollen sterility depends on both cytoplasmic factors and nuclear genes, it is called cytoplasmic-genetic male sterility, abbreviated…
Correct answer: CGMS- A. Bateman (1952)
- B. Koelreuter (1763)
- C. Stout (1917)
- D. Braw baker (1958)
Explanation: Koelreuter reported male sterility in flowering plants in 1763 during his early hybridisation experiments.
Correct answer: Koelreuter (1763)1533. Mating system in which each female gamete () with every male gamete is known as____________________?
- A. Genetic assortative mating
- B. Random mating
- C. Genetic disassortative mating
- D. None of the above
Explanation: Random mating means that any female gamete can unite with any male gamete with equal opportunity, producing a freely interbreeding…
Correct answer: Random mating- A. Herkogamy
- B. Dichogamy
- C. Homogamy
- D. Chasmogamy
Explanation: Homogamy occurs when anthers and stigmas mature at the same time, allowing self-pollination.
Correct answer: Homogamy- A. Apogamy
- B. Autogamy
- C. Apospory
- D. Parthenogenesis
Explanation: Parthenogenesis is embryo development from an unfertilized egg cell. Apogamy differs because the embryo develops from a non-egg cell of…
Correct answer: Parthenogenesis- A. Flemming (1882)
- B. Nilson (1900)
- C. De Vilmorin (1856)
- D. Rimpu (1890)
Explanation: The term mitosis was coined by Walther Flemming in 1882, based on the thread-like appearance of chromosomes during cell division.
Correct answer: Flemming (1882)- A. Mitosis
- B. Meiosis
- C. Peleiotropy
- D. None of the above
Explanation: Meiosis generates variability through crossing over, independent assortment and the formation of genetically different gametes.
Correct answer: Meiosis- A. Inbreeding
- B. Syn breeding
- C. Out breeding
- D. All the above
Explanation: Allogamy is fertilization between genetically different individuals, so it is a natural form of outbreeding.
Correct answer: Out breeding- A. Genetic erosion
- B. Land races
- C. Centers of diversity
- D. Genetic diversity
Explanation: Genetic erosion is the gradual loss of genetic variability, often caused by replacing diverse landraces with a few uniform modern…
Correct answer: Genetic erosion- A. teriary gene pool
- B. Land races
- C. Obsolete cultivars
- D. Modern cultivars
Explanation: Landraces are primitive, locally adapted cultivars maintained and selected by farmers over many generations.
Correct answer: Land races