agriculture MCQs – Page 64

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 Review each marked answer and report any item that may be outdated or unclear.

1261. Hereditary variations in plants have been produced by the use of________________?
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A. Gibberrellic acid

B. Auxins

C. X-rays

D. DDT

1262. The crossing of a yomozygous tall plant and a homozygous dwarf plant would yield plants in the ratio of_________________?
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A. 2 tall: 2 dwarf

B. All the heterozygous tall

C. One homozygous tall, one homozygous dwarf, two heterozygous tall

D. All homozygous dwarf

1263. Heat, cold and frost resistance ideotype have been developed in_____________________?
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A. Cereals

B. None of the above

C. Pulses

D. Millet

1264. Common and easily available source of energy does not contain RNA__________________?
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A. ATP

B. RNA

C. DNA/RNA

D. DNA

1265. High values of genetic advance are indicative of____________________?
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A. Partial dominance gene action

B. non-additive gene action

C. Dominance gene action

D. Additive gene action

1266. The geometrical device that helps in visnalizing all the possible combinations of male and female gametes known as____________________?
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A. Mendel square

B. Punneu square

C. Morgan square

D. Bateson square

1267. Srought is indicated by__________________?
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A. Increase in proline level

B. all the above

C. Increase in ethylene level

D. leaf rolling

1268. Gradual reduction on genetic variability due to elimination of various () is called_______________________?
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A. Centers of diversity

B. Genetic erosion

C. Genetic diversity

D. Land races

1269. Liposomes originated from____________________?
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A. Leucoplasts

B. Plastids

C. Mitochondria

D. Ribosomes

1270. The functional unit of mutation is___________________?
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A. Mouton

B. Gene

C. Gaston

D. Recon

1271. The smell in onion bulb is due to________________?
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A. Bad odour of soil

B. Sulphur compounds

C. Freshy leaves

D. Much sugar

1272. Allogamy is the common form of________________________?
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A. Syn breeding

B. All the above

C. Out breeding

D. Inbreeding

1273. Somatic hybrid Pomato was produced by fusion between potato and tomato by__________________?
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A. Guha and Maheshwari (1974)

B. Sam Norum (1976)

C. Melchers et al (1978)

D. Glebe and Hoffmann (1979)

1274. Which generate variability_________________?
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A. Peleiotropy

B. None of the above

C. Mitosis

D. Meiosis
1275. The food in onion is stored in_________________?
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A. Stem

B. leaves

C. Scale leaves

D. Root

1276. The smallest cell organelle so far is_____________________?
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A. Spherosome

B. Lysosome

C. Ribosome

D. Peroxisome

1277. Discriminant function of plant selection was suggested by____________________?
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A. Yates (1947)

B. Smith (1936)

C. Griffing (1956)

D. Kempt Horne (1957)

1278. A nullisomic individual is represented by________________?
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A. 2n-2

B. 2n-1

C. 2n+1

D. 2n+2

1279. In wheat, example of durable insect resistance includes resistance to___________________?
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A. All the above

B. Stem saw fly

C. Hessian fly

D. Green bugs

1280. The term heterosis was coined by____________________?
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A. Bruce (1910)

B. Shull (1914)

C. Hull (1945)

D. East (1908)