Free Plant Protection MCQs with Answers
321 Plant Protection MCQs from Agriculture, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
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321 questions · page 11 of 17
- A. General resistance
- B. Cross resistance
- C. Specific resistance
- D. Horizontal resistanceAccess Government Careers
Explanation: Specific, or vertical, resistance differs among cultivars when they are tested against the same insect biotype.
Correct answer: Specific resistance- A. Specific resistance
- B. Cross resistance
- C. General resistance
- D. Horizontal resistance
Explanation: Horizontal resistance shows no differential interaction between crop cultivars and insect biotypes, so its effectiveness is relatively…
Correct answer: Horizontal resistance- A. Immunity
- B. Tolerance
- C. Resistance
- D. Plant resistanceGet Language Courses
Explanation: Immunity means complete resistance, so the adverse condition cannot establish or cause damage in the plant.
Correct answer: Immunity- A. Pest avoidance
- B. Resistance
- C. Plant resistance
- D. Tolerance
Explanation: Pest avoidance is the plant's tendency to escape infestation, often through characteristics such as unsuitable growth timing, structure…
Correct answer: Pest avoidance205. Chemicals, which transmit the chemical message, to individual of various species_________________?
- A. Semio chemicals
- B. Allelo chemicals
- C. Primers
- D. ReleasersDownload Nature Guides
Explanation: Allelochemicals are chemical signals exchanged between organisms of different species, whereas pheromones act between members of the same…
Correct answer: Allelo chemicals- A. Chemokinesis
- B. Klinokinesis
- C. Hydrokinesis
- D. Stereokinesis
Explanation: Stereokinesis is movement or locomotor activity triggered by contact or touch.
Correct answer: Stereokinesis- A. Releasers
- B. Primers
- C. Semiochemicals
- D. Allelochemicals
Explanation: Releaser pheromones produce a rapid behavioural response, while primer pheromones cause slower physiological or developmental changes.
Correct answer: Releasers- A. Orthokinesis
- B. Kinesis
- C. Uniokineses
- D. Hydrokinesis
Explanation: Kinesis is nondirectional movement in which the stimulus affects activity but does not determine the direction of movement.
Correct answer: Kinesis- A. Polyenibryony
- B. Pacdogenesis
- C. Vtviparity
- D. Parthenogenesis
Explanation: Parthenogenesis is reproduction in which offspring develop from unfertilized eggs.
Correct answer: Parthenogenesis- A. Sugar breakers
- B. Fat and oil breakers
- C. Protein breakers
- D. Oxygen breakersHire Grant Writers
Explanation: Carbohydrases break down carbohydrates into simpler sugars, so they are called sugar-breaking enzymes.
Correct answer: Sugar breakers- A. Causes moulting
- B. 2nd and 3rd both
- C. Maintains immature forms during larval moults
- D. Larval organism is to be made after moulting
Explanation: Juvenile hormone preserves larval characteristics during moulting, so the insect remains immature after the moult.
Correct answer: 2nd and 3rd both- A. Prevent evaporation
- B. impermeability of water
- C. Rigidity of body parts
- D. Toughness and flexibility
Explanation: The exocuticle is the hardened, sclerotized outer part of the cuticle and gives insect body parts rigidity.
Correct answer: Rigidity of body parts- A. Integument
- B. Exoskeleton
- C. Internal skeleton
- D. None of the above
Explanation: The integument is the complete insect body wall, consisting of the cuticle, epidermis and basement membrane.
Correct answer: Integument- A. Raptiorial
- B. Saltatorial
- C. Cursorial
- D. Netatiorial
Explanation: Grasshoppers have enlarged hind legs adapted for jumping, called saltatorial legs.
Correct answer: Saltatorial- A. Basket like
- B. Netatorial
- C. Cursorial
- D. Fossorial
Explanation: Ants, butterflies, wasps and moths generally use cursorial legs for walking or running.
Correct answer: Cursorial- A. Frenulum
- B. Jugum
- C. Retainaculum
- D. hamuli
Explanation: Hamuli are small hooks on the hind-wing margin of bees that engage the forewing and couple the two wings during flight.
Correct answer: hamuli- A. Membrarieous
- B. Stripy
- C. halteres
- D. Elytra
Explanation: Thrips have narrow, strap-like wings fringed with hairs, represented here by “stripy” or strip-like wings.
Correct answer: Stripy- A. Filohalteres
- B. Halteres
- C. pseudohalteres
- D. Hemelytra
Explanation: In Strepsiptera, the forewings are reduced and modified into balancing organs called pseudohalteres.
Correct answer: pseudohalteres- A. hemelgtra
- B. Hemelytra
- C. Stripy
- D. Tegmina
Explanation: Grasshoppers and cockroaches have leathery forewings called tegmina, which protect the more delicate hindwings.
Correct answer: Tegmina- A. Obtect
- B. Coarctate
- C. Platyform
- D. Exarate
Explanation: An exarate pupa has free, visible appendages that are not glued to the body.
Correct answer: Exarate