Q: Which microorganism is used in brewing industry?
Answer: Yeast
Q: Maximum population of Radopholus similis occurs at which soil depth?
Answer: 20–30 cm
Q: Downy mildew is caused by which order?
Answer: Peronosporales
Q: Organisms lacking a well-defined nucleus are called?
Answer: Prokaryotes
Q: Plant mycoplasmal diseases are transmitted by?
Answer: Leaf hoppers
Q: Two important diseases of sugarcane?
Answer: Red rot and grassy shoot
Q: Tilletia causes which disease?
Answer: Bunt
Q: Dithane Z-78 belongs to which class?
Answer: Dithiocarbamate
Q: Tobacco mosaic virus was first reported by?
Answer: Mayer
Q: Tobacco mosaic virus was crystallized first by?
Answer: Stanley
Q: Tomato leaf curl is caused by?
Answer: Virus
Q: Trichodorus belongs to which nematode family?
Answer: Trichodoridae
Q: Who is known as the father of nematology?
Answer: N.A. Cobb
Q: Bacterial cells form which structure under unfavorable conditions?
Answer: Endospores
Q: Cellulose-attacking fungi during decomposition include?
Answer: Trichoderma and Aspergillus
Q: Aflatoxin is produced by which fungus?
Answer: Aspergillus flavus
Q: Fungus suppressing soil pathogens?
Answer: Trichoderma viride
Q: Root-knot nematode species?
Answer: Meloidogyne
Q: Carbamate nematicide example?
Answer: Aldicarb
Q: Nutrient supplied by mycorrhiza?
Answer: Phosphorus
Q: Gram-positive bacterium example?
Answer: Corynebacterium
Q: Poisonous mushroom example?
Answer: Amanita
Q: Latent period in plant disease means?
Answer: Period between inoculation and first symptom appearance
Q: Systemic fungicides examples?
Answer: Vitavax, Bavistin, Calisin
Q: Nematode shape maintained by?
Answer: Pseudocoelomic fluid
Q: Downy mildew fungus example?
Answer: Sclerospora
Q: Best method to control wheat ear cockle?
Answer: Mechanical separation of infected seeds by flotation
Q: Cause of spreading decline in citrus?
Answer: Nutritional deficiency
Q: Ergot of bajra infects via?
Answer: Local infection of blossom
Q: Correct biocontrol operation order?
Answer: Parasite → Mass rearing → Release → Parasitism
Q: Incorrect pair in crops and diseases?
Answer: Karnal bunt – Neovossia horrida of wheat
Q: Correct crop-disease match?
Answer: Cucumber – Club root
Q: Sprayer pressure failure can be solved by?
Answer: Tightening lid and replacing gasket
Q: Sprayer requiring lowest solution volume?
Answer: Hand sprayer
Q: Economic threshold level definition?
Answer: Pest population at which control prevents economic injury
Q: Alternate host of a pathogen?
Answer: One of two hosts to complete parasitic life cycle
Q: Tissue for virus-free potato plant?
Answer: Meristem tip
Q: Symbiotic relationship example?
Answer: Rhizobium
Q: First reported plant bacterial disease?
Answer: Fire blight of apple
Q: Whip smut of sugarcane caused by?
Answer: Ustilago scitaminea
Q: White rust of crucifers caused by?
Answer: Albugo
Q: Antibiotics first discovered by?
Answer: Alexander Fleming
Q: 2n denotes?
Answer: Number of chromosome sets in somatic cells
Q: Extra chromosome pair in addition to normal?
Answer: Tetrasomic
Q: Character determined by many genes?
Answer: Quantitative character
Q: Biome is?
Answer: Complex of plant and animal communities under similar climatic conditions
Q: Pollination in unopened flower is called?
Answer: Cleistogamy
Q: Criss-cross inheritance is shown by?
Answer: Sex-linked character
Q: Cybrid is?
Answer: Hybrid formed by cell fusion
Q: Dry, one-seeded fruit from superior ovary?
Answer: Caryopsis
Q: Fruit from inflorescence?
Answer: Composite fruit
Q: Fruit from apocarpous pistil?
Answer: Aggregate fruit
Q: Generative nucleus divides how?
Answer: Mitotically
Q: Head or capitulum characteristic of?
Answer: Compositae
Q: Colocasia (Taro) is example of?
Answer: Corm
Q: Homozygous line developed by selfing in cross-pollinated crop?
Answer: Inbred line
Q: Hybrid is always?
Answer: Heterozygous
Q: Large unit of natural vegetation?
Answer: Plant formation
Q: Maintainer line is?
Answer: Male fertile but cannot restore fertility
Q: Male child genetic composition?
Answer: XY
Q: Male gametophyte in angiosperms contains?
Answer: Two male gametes and one tube nucleus
Q: Self-pollinated population in Mendelian sense?
Answer: Inbred population
Q: Breeding method to induce variation in vegetative crops?
Answer: Polyploidy
Q: Mixture of two immiscible liquids?
Answer: Emulsion
Q: Plant bearing both male and female flowers?
Answer: Monoecious
Q: Plant breeder controls pollination to?
Answer: Prevent cross-pollination and control breeding
Q: Plant cell in hypotonic solution does not burst because?
Answer: Inelastic cell wall
Q: Plant with 2n = 20 has how many linkage groups?
Answer: 10
Q: Plant with genotype Gg Ww produces which gametes?
Answer: GW, Gw, gW, gw
Q: Solubility of solid in liquid increases with?
Answer: Temperature
Q: Restorer gene present in?
Answer: Nucleus
Q: Meiotic cell division when homologous chromosomes separate?
Answer: Anaphase I
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