This quiz works best with JavaScript enabled. Home > Agriculture > Plant Diseases > Identification > Plant Diseases – Quiz 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Plant Diseases Quiz 2 (26 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following is a physical plant defence? A) Producing antibacterial substances. B) Thorns and spikes. C) Tough waxy cuticles. D) Mimicry. Show Answer Correct Answer: C) Tough waxy cuticles. 2. How do insects damage a plant? A) They reduce the area for photosynthesis. B) They destroy cells. C) They act as a vector, transferring viruses, bacteria and fungi between the plants. D) They prevent plants from acquiring the water and minerals it needs. Show Answer Correct Answer: C) They act as a vector, transferring viruses, bacteria and fungi between the plants. 3. What are magnesium Ions needed for? A) Protein Synthesis. B) Making Chlorophyll. C) Communists. D) None of above. Show Answer Correct Answer: B) Making Chlorophyll. 4. How is rose black spot spread? A) By Seeds. B) By aphids. C) By spores. D) By pollinating bees. Show Answer Correct Answer: C) By spores. 5. How do nematode worms damage a plant? A) They reduce the area for photosynthesis. B) They destroy cells. C) They act as a vector, transferring viruses, bacteria and fungi between the plants. D) They prevent plants from acquiring the water and minerals it needs. Show Answer Correct Answer: D) They prevent plants from acquiring the water and minerals it needs. 6. What is chlorosis caused by? A) Water deficiency. B) Nitrate deficiency. C) CO2 deficiency. D) Magnesium deficiency. Show Answer Correct Answer: D) Magnesium deficiency. 7. How does Callose prevent the spread of pathogens? A) Causes abscission. B) Blocks the sieve plates in the phloem. C) Blocks the xylem. D) Blocks the sieve plates in the xylem. Show Answer Correct Answer: B) Blocks the sieve plates in the phloem. 8. What type of disease is tobacco mosaic? A) Viral. B) Fungal. C) Bacterial. D) Deficiency. Show Answer Correct Answer: A) Viral. 9. What prevents water from collecting on the surface? A) Leaves falling of. B) Layer of dead skin. C) Waxy cuticle. D) Cellulose Cell wall. Show Answer Correct Answer: C) Waxy cuticle. 10. What is stunted growth caused by? A) Water deficiency. B) CO2 deficiency. C) Magnesium deficiency. D) Nitrate deficiency. Show Answer Correct Answer: D) Nitrate deficiency. 11. How do plants use nitrate ions that are absorbed from the soil. A) To make proteins. B) To make starch. C) To make fats. D) To make sugars. Show Answer Correct Answer: A) To make proteins. 12. Which disease is correctly paired with the cause of the disease? A) Malaria - viruses. B) Athlete's foot - fungi. C) Influenza - bacteria. D) Pneumonia - protists. Show Answer Correct Answer: B) Athlete's foot - fungi. 13. Which of these does not cause plant diseases A) Fungi. B) Mineral deficiencies. C) Viruses. D) Ladybirds. Show Answer Correct Answer: D) Ladybirds. 14. Black sigatoka is an example of a A) Virus. B) Fungus. C) Protist. D) Bacteria. Show Answer Correct Answer: B) Fungus. 15. Plants also need nitrates to make proteins. They obtain these from A) The soil as nitrate ions. B) The air as nitrogen. C) The air as nitrate ions. D) The soil as nitrogen. Show Answer Correct Answer: A) The soil as nitrate ions. 16. What are the facultative parasites most likely to attack stressed plants? A) Fungi. B) Epiphyte. C) Galls. D) Moss. Show Answer Correct Answer: A) Fungi. 17. What has sharp mouths that helps it feed on phloem? A) The stem. B) Vector. C) Water. D) Aphids. Show Answer Correct Answer: D) Aphids. 18. When a plant responds to a pathogen by signalling all infected cells to induce apoptosis. A) Barrier Defenses. B) Hypersensitive response. C) Systemic Acquired response. D) Cytokine Storm. Show Answer Correct Answer: B) Hypersensitive response. 19. Some plants have thorns - what type of defence mechanism is this? A) Physical. B) Chemical. C) Mechanical. D) None of above. Show Answer Correct Answer: C) Mechanical. 20. Some glucose is used by plants to produce Cellulose, this is used to A) Build cell membranes. B) Strengthen cell walls. C) Make the nucleus. D) Make ribosomes. Show Answer Correct Answer: B) Strengthen cell walls. 21. What is meant by the term stunted growth? A) A plant grows too quickly and dies. B) Increased growth. C) Reduced growth. D) None of the above. Show Answer Correct Answer: C) Reduced growth. 22. Which plants are vunerable to black sigatoka? A) Banana. B) Papaya. C) Tomato. D) Potato. Show Answer Correct Answer: A) Banana. 23. Which of the following is a mechanical plant defence? A) Producing antibodies. B) Thorns and spikes. C) Tough waxy cuticles. D) Dead leaves. Show Answer Correct Answer: B) Thorns and spikes. 24. Which isn't a plant pathogen? A) Aphids. B) TMV. C) Black spot. D) Poisons. Show Answer Correct Answer: D) Poisons. 25. Which nutrients are required in relatively large amounts for plant growth? A) Manganese, iron, and copper. B) Nitrogen, phosphorus, potassium, and calcium. C) Zinc, sulfur, and boron. D) All of these. Show Answer Correct Answer: B) Nitrogen, phosphorus, potassium, and calcium. 26. Which of the following is the correct definition of autotrophic A) Organism that can't produce their own food through photosynthesis. B) The overload of nutrient uptake. C) Organism that can produce their own food through photosynthesis. D) The process of loss of green in leaves. Show Answer Correct Answer: C) Organism that can produce their own food through photosynthesis. ← PreviousRelated QuizzesPlant Diseases QuizzesAgriculture QuizzesPlant Diseases Quiz 1 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books