agriculture MCQs – Page 105

Practise multiple-choice questions from agriculture for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

5201. In lucern, toxic substance is found in_____________________?
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A. All the above

B. Coumarin

C. Saponin

D. Neurotoxin

5202. The smell in onion bulb is due to________________?
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A. Sulphur compounds

B. Bad odour of soil

C. Much sugar

D. Freshy leaves

5203. Convergent improvement was proposed by________________?
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A. Hays (1919)

B. Richy (1920)

C. East (1920)

D. Jones (1920)

5204. The first artificial hybridization in fruit crops was done by____________________?
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A. Knight

B. Morgan

C. Muller

D. Fischer

5205. The most effective method for the transfer of oligogenic characters________________?
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A. Disruptive

B. Bulk

C. Backcross

D. Pedigree

5206. Heterobeltiosis is estimated over the___________________?
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A. Popular variety

B. Mid parent

C. Standard parent

D. Better parent
5207. The value of regression and correlation is the same when the correlation between two variables is________________?
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A. Negative

B. Imperfect

C. Positive

D. Perfect
5208. Mating system in which each female gamete () with every male gamete is known as____________________?
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A. None of the above

B. Genetic disassortative mating

C. Random mating

D. Genetic assortative mating

5209. Dominance hypothesis of heterosis was first proposed by__________________?
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A. Bruce (1910)

B. Shull (1914)

C. Davenport (1908)

D. Davis (1927)

5210. The variety of genes and genotypes found in a particular crop special are_____________________?
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A. Gene sanctuaries

B. Genetic erosion

C. Field gene banks

D. Genetic diversity
5211. Cytoplasmic genetic male sterility was first discovered by___________________?
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A. Jones and Davies (1944)

B. Nilson (1900)

C. Bruce and Keeble (1908)

D. Devaries and Correns (1900)

5212. A place or area where maximum variability of crop plants is observed__________________?
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A. Micro centers

B. Gene sanctuaries

C. Centers of diversity

D. Genetic diversity

5213. Pure line theory was developed by_______________?
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A. Thoday (1960)

B. Johannsen (1903)

C. Mather (1951)

D. Allard (1957)

5214. Anthesis starts in wheat at__________________?
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A. 7.00 am

B. 5.20 pm

C. 10.00 am

D. 1.15 pm
5215. Rice flowers have___________________?
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A. Eight stamens

B. Six stamens

C. None of the above

D. Four stamens

5216. Concept of biparental mating was developed by__________________?
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A. Comstock and Robinson (1948)

B. Hayman (1958)

C. Jinks and Jones (1958)

D. Perkins (1968)

5217. Conservation of germplasm under natural condion is called_________________?
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A. In-situ conservation

B. Obsolute cultivars

C. Ex-situ conservation

D. Gene bank

5218. Cuscuta is an object ional weed of_____________________?
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A. Sorghum

B. Luceru

C. Berseem

D. Cowpeas

5219. Citification is not required for_____________________?
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A. Nucleus seed

B. Certified seed

C. Foundation seed

D. Breeder seed
5220. Mating between distantly related individuals is known as________________?
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A. All the above

B. Out breeding

C. Inbreeding

D. Amphimixis

5221. Self incompatibility which is controlled by two genes is found in___________________?
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A. Solanaceae

B. None of the above

C. Gramineae

D. Cruciferae

5222. Soybean contains___________________?
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A. Typsin inhibitor

B. Goiterogens

C. Both A & B

D. Neither

5223. An individual lacking only one chromosome from the diploid set is referred as_________________?
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A. Nullisomic

B. Tetrasomic

C. Trisomic

D. Monosomic
5224. In pulses, limiting amino acids include__________________?
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A. Threamine

B. Lysine

C. Methionine

D. Tryptophan
5225. Discriminant function of plant selection was suggested by____________________?
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A. Kempt Horne (1957)

B. Griffing (1956)

C. Yates (1947)

D. Smith (1936)
5226. In barley, resistance to cereal leaf beetle is associated with_________________?
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A. High aspartic acid

B. High silica content

C. Waxiness of leaves

D. High benzol alcohol

5227. Blackeselee reported the first case of monoploid in__________________?
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A. Oat

B. Brassica

C. Rye

D. Datura
5228. In half diallel, total crosses among parents are equal to___________________?
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A. P (P-1)/2

B. P (P-1)

C. P (P+1)/2

D. P2

5229. Estimation of correlation form error variances and covariances is________________?
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A. Genotypic correlation

B. Simple correlation

C. Phenotypic correlation

D. Environmental correlation

5230. Amphimixis refers to_______________________?
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A. Sexual reproduction

B. None of the above

C. Apomixes

D. Asexual reproduction

5231. Protoandry is found in____________________?
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A. Maize

B. Barley

C. Wheat

D. Sorghum

5232. Specific combining ability is primarily a function of___________________?
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A. Dominance x dominance epistasis

B. Additive x dominance epistasis

C. All the above

D. Dominance variance

5233. RELPs, RAPD are helpful in___________________?
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A. Identify new gene

B. All the above

C. Gene mapping

D. Gene sequencing

5234. The term recurrent selection was coined by_________________?
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A. Hull (1945)

B. Garber (1955)

C. Hull (1950)

D. Hays (1919)

5235. Germplasm gene banks for different crop plants in world are about_____________________?
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A. 980

B. 1200

C. 1080

D. 1100

5236. The food in onion is stored in_________________?
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A. leaves

B. Scale leaves

C. Stem

D. Root

5237. Anthesis starts in Allium cepa at___________________?
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A. 5.00 pm

B. 3.00 pm

C. 7.00 am

D. 10.00 am

5238. Male sterility in flowering plants was first reported is__________________?
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A. Bateman (1952)

B. Stout (1917)

C. Braw baker (1958)

D. Koelreuter (1763)
5239. Genetic correlation between two variables may be due to___________________?
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A. Dominance

B. Selection differential

C. Peliotropy

D. Gene interaction

5240. Genetic male sterility is controlled by_________________?
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A. All the above

B. nuclear genes

C. Non alleleic genes

D. Allelic genes

5241. Tea, coffee and mango seeds can not be converted in seed banks because they drastic loss in viability with decrease in moisture content below.___________________?
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A. 18%

B. 12%

C. 15%

D. 20%

5242. The concept of multi line varieties was developed by_________________?
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A. Falconer (1960)

B. Johannsen (1903)

C. Goulden (1939)

D. Jensen (1952)
5243. Parthenocarpy is the production of____________________?
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A. Fruit without pollination

B. Only seed and no fruit

C. fruit without fertilization

D. Seed without fertilization

5244. Law of parallele variation was given by___________________?
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A. Vavilov

B. Wilkins

C. None of the above

D. Jacob

5245. Concept of ideotype___________________?
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A. Model plant type

B. Good plant model

C. Ideal plant type

D. All the above
5246. Cytoplasmic sterility is govemed by________________________?
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A. None of the above

B. Plasma genes

C. Nuclear genes

D. Monoalleleic genes

5247. Which one is C3 crop plant__________________?
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A. all the above

B. Tomato

C. Onion

D. Gram

5248. Drought resistance is associated with___________________?
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A. Physiological factors

B. all the above

C. Biochemical factors

D. Morphological factors

5249. Low magnitude of genotype x environmental interaction indicates__________________?
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A. Stability

B. Low buffering capacity

C. Adaptability

D. High buffering capacity
5250. Ratio of additive variance to phenotypic variance is called___________________?
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A. Heritability (broad sense)

B. Genetic gain

C. Heritability (narrow sense)

D. Co-heritability