All Free Agriculture MCQs with Answers

• A. S*x limited trait
• B. S*x influenced trait
• C. S*x linked trait
• D. None of above

Explanation: Most common colour blindness is an X-linked recessive trait, so it is transmitted through a sex chromosome and occurs more often in males.

• A. East Asia
• B. South America
• C. West Africa
• D. North America

Explanation: Cultivated sunflower originated in North America, where it was domesticated from wild sunflower populations.

• A. Speciation
• B. Specialization
• C. Smog
• D. None of theseGeology

Explanation: Speciation is the evolutionary process by which populations become sufficiently different to form new species.

• A. Dr.Muhammad Sharif
• B. Theodore-saussure
• C. Shafiq Baloch at.el
• D. Sach and knoop

Explanation: Theodore de Saussure helped establish the importance of nitrogen and other mineral nutrients in plant growth through controlled…

• A. Cystine
• B. Cystein
• C. Methionine
• D. All of these

Explanation: Sulphur occurs in the amino acids cystine, cysteine and methionine; cystine contains a disulphide bond formed from two cysteine molecules.

• A. Genetics
• B. Embryology
• C. Biology
• D. Histology

Explanation: Genetics studies heredity and variation, explaining how traits are transmitted and differ among organisms.

• A. 32
• B. 15
• C. 16
• D. 3

Explanation: The traditional list recognizes 16 essential elements for plant growth, including carbon, hydrogen, oxygen, the primary and secondary…

• A. Chailakhian
• B. Gassner
• C. Lysenko
• D. Wrinkker

Explanation: Trofim Lysenko introduced the term vernalization in 1928 for inducing flowering by exposing seeds or seedlings to low temperature.

• A. Pollination
• B. All the above
• C. Self Pollination
• D. Cross Pollination

Explanation: Cross-pollination combines genetic material from different plants, producing variation that can improve adaptability and often hybrid…

• A. Biffen (1905)
• B. Flor (1956)
• C. Van der plank (1963)
• D. Painter (1951)

Explanation: Biffen reported the early genetic resistance of potato to late blight in 1905, associated with the R-gene concept later developed through…

• A. Auxins
• B. Cytokinins
• C. Gibberellins
• D. IAA

Explanation: Cytokinins promote cell division and also help regulate shoot formation and delay leaf senescence.

• A. Phototropism
• B. Photolysis
• C. Photoperiodism
• D. Photosynthesis

Explanation: Photoperiodism is the response of plants to the relative lengths of day and night, especially in relation to flowering.

• A. Allogamy
• B. Autogamy
• C. Polygamy
• D. Cleistogamy

Explanation: Allogamy is pollination between flowers on different plants of the same species.

• A. Karpocho (1810)
• B. Knight (1800)
• C. Jones (1917)
• D. none

Explanation: Thomas Andrew Knight carried out early artificial hybridization work in fruit crops around 1800, particularly in fruit-tree breeding.

• A. 2 D
• B. 2d
• C. ID
• D. Id

Explanation: Resistance to woolly apple aphid is generally described as being controlled by one dominant gene, often written as 1D in older MCQ…

• A. Jones (1917)
• B. Muller (1927)
• C. Fray (1966)
• D. Karpehenko (1927)

Explanation: Karpechenko produced the radish–cabbage hybrid Raphanobrassica in 1927 by chromosome doubling, which restored fertility in the otherwise…

• A. developed ovary after fertilization
• B. Transformed ovule after fertilization
• C. Developed egg after fertilization
• D. None of the above

Explanation: A seed develops from a fertilized ovule, while the ovary develops into the fruit.

• A. Promote seed maturation
• B. Enhance maturity in plants
• C. Promote flowering
• D. Initiate fertilization

Explanation: Vernalization is the induction or acceleration of flowering by exposing a plant or seed to a period of low temperature.

• A. Tag men
• B. Seed coat
• C. Axil
• D. Tesla

Explanation: The outer integument develops into the testa, or seed coat, while the inner integument forms the tegmen.

• A. Grape
• B. Orange
• C. Apple
• D. Mango

Explanation: Parthenogenesis or related seedless-fruit development is commonly associated with grape, producing seedless berries.