281. Shoot tip culture are preferred for inter national exchange of germplasm because

A They are more stable
B These are eaiser to regenerate
C There produce virus free clone plants
D All the three statements are correct
Answer :   All the three statements are correct
Discuss Question

282. If a breeder has to evolve a disease resistant strain, what step will be taken first

A Hybridisation
B Selection of parents
C Working out the yield
D Looking for the subject in the library
Answer :   Selection of parents
Discuss Question

283. Select the incorrect statement.

A Inbreeding increases homozygosity
B Inbreeding is essential to evolve purelines in any animal
C Inbreeding selects harmful recessive genes that reduce fertility and productivity
D Inbreeding helps in accumulation of superior genes and elimination of undesirable genes
Answer :   Inbreeding selects harmful recessive genes that reduce fertility and productivity
Discuss Question

284. Consider the following four measures (1-4) that could be taken to successfully grow chickpea in an area where bacterial blight disease is common
(1) Spray with Bordeaux mixture
(2) Control of the insect vector of the disease pathogen
(3) Use of only disease-free seeds
(4) Use of varieties resistant to the disease
Which two of the above measures can control the disease?

A 2 and 3
B 1 and 2
C 3 and 4
D 1 and 4
Answer :   3 and 4
Discuss Question

285. Largest group of insecticide of plant origin are

A Organochlorines
B Triazines
C Pyrethhoids
D Carbamates
Answer :   Pyrethhoids
Discuss Question

286. Which is not a plant fibre

A Coir
B Silk
C Sunn Hemp
D Manila Hemp
Answer :   Silk
Discuss Question

287. Silk is produce by

A Larva
B Cocoon
C Larva & adult moth
D Adult moth
Answer :   Larva
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288. A gene bank is a place where valuable plant material is preserved in viable condition- gene bank are parts of

A In situ conservation
B Ex situ conservation
C Both in situ & Ex-situ conservation
D None of the above
Answer :   Ex situ conservation
Discuss Question

289. Homozygous purelines in cattle can be obtained by:

A mating of unrelated individuals of same breed
B mating of individuals of different breed
C mating of individuals of different species
D mating of related individuals of same breed
Answer :   mating of related individuals of same breed
Discuss Question

290. Thurioside

A Insecticide
B Fungicide
C Antibiotic
D Weedicide
Answer :   Insecticide
Discuss Question

Practice More MCQ Question on Biology Section

BotanyThe Living WorldBiological ClassificationPlant KingdomMorphology of Flowering PlantsAnatomy of Flowering PlantsCell: The Unit of LifeCell Cycle and Cell DivisonTransport in PlantsMineral NutritionPhotosynthesis in Higher PlantsRespiration in PlantsPlant Growth and DevelopmentReproduction in OrganismsSexual Reproduction in Flowering PlantsPrinciples of Inheritance and VariationMolecular Basis of InheritanceStrategies for Enhancement in Food ProductionMicrobes in Human WelfareOrganisms and PopulationsEcosystemBiodiversity and ConservationEnvironmental IssuesBotany Miscellaneous
ZoologyAnimal KingdomStructural Organisation in AnimalsBiomoleculesDigestion and AbsorptionBreathing and Exchange of GasesBody Fluids and CirculationExcretory Products and Their EliminationLocomotion and MovementNeural Control and CoordinationChemical Coordination and IntegrationHuman ReproductionReproductive HealthEvolutionHuman Health and DiseasesBiotechnology: Principles and ProcessesBiotechnology and its ApplicationsZoology Miscellaneous