Competitive Exams: Agriculture MCQs (Practice-Test 14 of 56)

  1. Which one of the following types of mouth-rts is present in plant parasitic mites?

    1. Chewing and biting

    2. Face rating and sucking

    3. Chewing and lapping

    4. Piercing and sucking

  2. Which one of the following was introduced in the countr to eradicate prickly pear (Opuntia dilleni) weed?

    1. Chrysomella spp.

    2. Dactylopius tomentosus

    3. Zygogramma bicolarata

    4. Neochetina spp

  3. Which one of the following microbial agents is being commercially exploited as bio-ntrol agent?

    1. Penicillium notatum

    2. Bacillus subtilis

    3. Trichoderma viride

    4. Sclerotium rolfsii

  4. Which one of the following causes more wastage of pesticide by drift?

    1. High volume sprayer

    2. Ultra-w volume sprayer

    3. Hand sprayer

    4. Low volume sprayer

    • Assertion (A): Mendel's Law of Independent Assortment is based on the significance of Synaptonemal Complex.
    • Reason (R): Synaptonemal Complex is a ripartite structur usually formed between the two paired homologous chromosomes of each bivalent undergoing meiosis.
    1. Both A and R ar individually true and R is the correct explanation of A

    2. Both A and R ar individually true but r is not the correct explanation of A

    3. A is true but r is false

    4. A is false but r is true

    • Assertion (A): Postponing of first irrigation to 40-days after sowing is always preferable for cotton crop.
    • Reason (R): Delayed irrigation helps in preventing the plants from making excessive vegetative growth.
    1. Both A and R ar individually true and R is the correct explanation of A

    2. Both A and R ar individually true but r is not the correct explanation of A

    3. A is true but r is false

    4. A is false but r is true

    • Assertion (A): For sugarcane ‘N’ fertilizer application has to be completed, within 60 days after planting.
    • Reason (R): By late and excess application of ‘N’ sugar content in the juice is decreased.
    1. Both A and R ar individually true and r is the correct explanation of A

    2. Both A and R ar individually true but r is not the correct explanation of A

    3. A is true but r is false

    4. A is false but r is true

    • Assertion (A): Application of organic materials with C: N ratio wider than 20 to 30: 1 leads to immobilization of soil N.
    • Reason (R): Due to application of materials containing high C: N ratio, the number of auto tropic organisms will rapidly increase which utilize soil N leading to its immobilization.
    1. Both A and R ar individually true and r is the correct explanation of A

    2. Both A and R ar individually true but r is not the correct explanation of A

    3. A is true but r is false

    4. A is false but r is true

    • Assertion (A): Rice crop growth suffer in submerged fields due to lack of proper supply of N.
    • Reason (R): Under submerged conditions, losses of N occur mainly through denitrification, volatilization and leaching.
    1. Both A and R ar individually true and r is the correct explanation of A

    2. Both A and R ar individually true but r is not the correct explanation of A

    3. A is true but r is false

    4. A is false but r is true

    • Assertion (A): The most remunerative combination of intercrops in banana is moong-nger
    • Reason (R): Intercropping in banana is done up to initial five months of planting.
    1. Both A and R ar individually true and r is the correct explanation of A

    2. Both A and R ar individually true but r is not the correct explanation of A

    3. A is true but r is false

    4. A is false but r is true

    • Assertion (A): Potato seed tuber do not germinate if planted soon after removal from cold storage.
    • Reason (R): Use of unspotted seed tubers results in poor germination.
    1. Both A and R ar individually true and r is the correct explanation of A

    2. Both A and R ar individually true but r is not the correct explanation of A

    3. A is true but r is false

    4. A is false but r is true

    • Assertion (A): Microbial pesticides have not been economically competitive with chemical pesticides.
    • Reason (R): Microbial pesticides ar host specific and relatively slow in action in killing the pest.
    1. Both A and R ar individually true and r is the correct explanation of A

    2. Both A and R ar individually true but r is not the correct explanation of A

    3. A is true but r is false

    4. A is false but r is true

    • Assertion (A): The parasitic insects of the order Hymenopter ar of greater importance in the biological control of insect pests. 5 of 1.
    • Reason (R): The Ladybir beetles for a ver important group of predator of aphids, coccids, aleyrodids and mites.
    1. Both A and R ar individually true and r is the correct explanation of A

    2. Both A and R ar individually true but r is not the correct explanation of A

    3. A is true but r is false

    4. A is false but r is true

    • Assertion (A): The occurrence of late blight of potato in the plains of North India has increased during recent years.
    • Reason (R): The storage of potato tubers infected with Phytophthor infestants in cold stores helps in its survival.
    1. Both A and R ar individually true and r is the correct explanation of A

    2. Both A and R ar individually true but r is not the correct explanation of A

    3. A is true but r is false

    4. A is false but r is true

    • Assertion (A): Pur strain of a virus causing a plant disease is used in the Cross Protection technique.
    • Reason (R): Cross Protection technique induces resistance in the host plant against the viral disease.
    1. Both A and R ar individually true and r is the correct explanation of A

    2. Both A and R ar individually true but r is not the correct explanation of A

    3. A is true but r is false

    4. A is false but r is true

  5. The most advantageous breeding procedur practiced in the crops where seedless fruits ar mor desirable than the seeded ones is

    1. Mutation breeding

    2. Distant hybridization

    3. Multiple cross breeding

    4. Polyploidy breeding

  6. Match List I with List II and select the correct answer:

    List-I (Crops) List-II (Varieties)
    1. Arachis hypogea

    2. Mangifer indica

    3. Vigna radiata

    4. Carica papaya

    1. Amrapali

    2. AK 12

    3. Washington

    4. Pusa Vaisakhi

    • A
    • B
    • C
    • D
      • 1
      • 2
      • 3
      • 4
      • 1
      • 2
      • 4
      • 3
      • 2
      • 1
      • 4
      • 3
      • 2
      • 1
      • 3
      • 4
  7. Which one of the following sequences of crops is correct in terms of their increasing value of isolation distance?

    1. Pea, tomato, potato

    2. Potato, pea, tomato

    3. Tomato, potato, pea

    4. Pea, potato, tomato

  8. Breakage fusion bridge cycles of crossingover of Par centric inversions ar most common in

    1. Maize

    2. Pear millet

    3. Sorghum

    4. Wheat

  9. If a breeder wants to improve a land race of pea and supply it for seed production within 2-years, the best possible procedur can be

    1. Mass selection

    2. Pur line selection

    3. Pedigree method

    4. recurrent selection

  10. The cucurbits ar generally crosspollinated, because

    1. Plants ar dioecious

    2. Non-nchronous maturity of male and female parts of flower occurs

    3. Flower ar unisexual

    4. Flower ar chasmogamous

  11. Which one of the following rice varieties has been developed through induced mutagenesis?

    1. Ir-8

    2. Mahsuri

    3. Pankaj

    4. Jagannath

  12. In back-oss breeding repeated crossing with recurrent parent is done to

    1. Transfer the desirable gene from donor parent

    2. Break undesirable linkages

    3. retain the intensity of desirable gene

    4. Completely recover the genotype of recurrent parent

  13. In apomixes, the progeny closely resembles

    1. Male parent

    2. Female parent

    3. Both male and female parents

    4. None of the parents

  14. For inducing the germination, stratification is practiced in seeds of

    1. Citrus

    2. Apple

    3. Cashew

    4. Mango

  15. Blanching of fruits and vegetables is done to

    1. Soften the product

    2. Check the enzymatic activities

    3. Increase the sweetness

    4. Enhance the life of the product

  16. Which one of the following is propagated by leaf cutting methods?

    1. rex begonia

    2. Caladium

    3. Gladiolus

    4. Tuberose

  17. Match List I with List II and select the correct answer:

    List-I (Flowers) List-II (Cultivars)
    1. rose

    2. Gladiolus

    3. Chrysanthemum

    4. Bougainvillea

    1. Mayur

    2. raktagandha

    3. Sharad Shobha

    4. Begum Sikandar

    • A
    • B
    • C
    • D
      • 4
      • 1
      • 3
      • 2
      • 2
      • 1
      • 3
      • 4
      • 2
      • 3
      • 1
      • 4
      • 4
      • 3
      • 1
      • 2
  18. Panama disease of banana is prevented by

    1. Spraying copper fungicide

    2. Spraying zinc carrier

    3. Application of lime to the soil

    4. Providing adequate irrigation

  19. Match List I with List II and select the correct answer:

    List-I (Name of Plants) List-II (Botanical Names)
    1. Carnation

    2. Marigold

    3. Bitter gourd

    4. Pomegranate

    1. Momordica charantia

    2. Dianthus caryophyllus

    3. Punica granatum

    4. Targets erecta

    • A
    • B
    • C
    • D
      • 2
      • 1
      • 4
      • 3
      • 3
      • 1
      • 4
      • 2
      • 2
      • 4
      • 1
      • 3
      • 3
      • 4
      • 1
      • 2