All Free Agriculture MCQs with Answers

• A. Hexaploid
• B. Teuaplioid
• C. Triploid
• D. Oetaploid

Explanation: Triticum aestivum, common bread wheat, is hexaploid with six complete chromosome sets and 2n = 42 chromosomes.

• A. Endosperm cell
• B. Leaf cells
• C. SynergidsOrder DNA Kits
• D. Cotyledonary cell

Explanation: A diploid chromosome number of 8 gives a haploid number of 4. Synergids are haploid cells of the embryo sac, whereas leaf and cotyledon…

• A. 10 chromosomes
• B. 20 chromosomes
• C. 40 chromosomes

Explanation: Meiosis halves the chromosome number, so a cell with 40 chromosomes produces haploid cells containing 20 chromosomes each.

• A. 8
• B. 32
• C. 64
• D. 120

Explanation: Each mitotic division doubles the number of cells, so after n divisions the number is 2ⁿ.

• A. Protein synthesis
• B. Starch synthesis
• C. Fat synthesis
• D. Anaerobic respiration

Explanation: Ribosomes read messenger RNA and join amino acids into polypeptide chains, making them the cell's sites of protein synthesis.

• A. Pith cells
• B. Cortex cells
• C. Tips of stem & rootsOrder DNA Kits
• D. Internodes regions

Explanation: Active cell division occurs in meristematic tissue, especially the apical meristems at the tips of shoots and roots.

• A. 100 metersHire Grant Writers
• B. 800 meters
• C. 200 meters
• D. 400 meters

Explanation: Sunflower foundation seed requires a 400-metre isolation distance to prevent contamination by pollen from other varieties or seed classes.

• A. Perfect
• B. Imperfect
• C. Positive
• D. Negative

Explanation: With perfect correlation, the relationship is exact and the standardized regression coefficient equals the correlation coefficient, with a…

• A. Frankel (1977)
• B. East and Mangelsdref (1925)
• C. Hughes and Babceek
• D. Bresbaker (1958)

Explanation: East and Mangelsdorf reported gametophytic self-incompatibility in 1925.

• A. Oat
• B. Sorghum
• C. Rice
• D. Wheat

Explanation: Donald coined the term ideotype in relation to wheat breeding, describing a model plant with traits expected to give high yield in a…

• A. All of the above
• B. Small waxy and thick leaves
• C. Sunken, small and less stomata
• D. Deep root system

Explanation: Deep roots improve access to stored soil water, while small, thick, waxy leaves and reduced or sunken stomata limit water loss.

• A. Biochemical factors
• B. all the above
• C. Morphological factors
• D. Physiological factors

Explanation: Drought resistance is a complex trait involving morphological features such as roots and leaves, physiological responses such as stomatal…

• A. Plasma genes
• B. Polygenes
• C. All the above
• D. Oligogenes

Explanation: Resistance may be controlled by major genes, several genes acting together, or cytoplasmic factors, depending on the host and pest or…

• A. Rice
• B. Wheat
• C. Barley
• D. Maize

Explanation: Rice has produced the largest number of officially recognized mutant varieties through mutation breeding.

• A. Mutator gene
• B. Mutable gene
• C. Antimutalor gene
• D. Hot spot

Explanation: A mutable gene is one that itself changes at an unusually high frequency.

• A. Brassica
• B. Rye
• C. Datura
• D. Oat

Explanation: Blakeslee reported the first monoploid, or haploid, plant in Datura. This discovery helped establish the importance of chromosome-number…

• A. Nullisomic
• B. Tetrasomic
• C. Trisomic
• D. Monosomic

Explanation: A monosomic individual has one chromosome fewer than the normal diploid complement, written as 2n−1.

• A. Tyagi and Prasad (1965)
• B. Greshof and Doy (1972)
• C. Mehta and Upadhya (1960)
• D. Singh (1960)

Explanation: Gresshoff and Doy reported haploid tomato plants through anther culture in 1972.

• A. Standard parent
• B. Mid parent
• C. Better parent
• D. Popular variety

Explanation: Heterobeltiosis is the superiority of a hybrid over its better parent, so it is estimated by comparing the hybrid with the…

• A. Hybrid
• B. Top cross
• C. Poly cross
• D. Inbred

Explanation: Repeated inbreeding of an allogamous, or cross-pollinated, species produces a highly homozygous true-breeding line called an inbred.