How to Identify and Classify Rubber Trees
  • 1. What is the scientific name of the most common rubber tree?
A) Manihot esculenta
B) Hevea brasiliensis
C) Castilla elastica
D) Ficus elastica
  • 2. Rubber trees are native to which continent?
A) Asia
B) Africa
C) Australia
D) South America
  • 3. What is the primary product harvested from rubber trees?
A) Latex
B) Fruit
C) Wood
D) Resin
  • 4. What is the typical color of the latex from a rubber tree?
A) Brown
B) Milky White
C) Green
D) Yellow
  • 5. What is the arrangement of leaves on a rubber tree stem?
A) Opposite
B) Basal
C) Alternate
D) Whorled
  • 6. What type of leaf is characteristic of Hevea brasiliensis?
A) Scale-like
B) Needle-like
C) Compound
D) Simple
  • 7. How many leaflets are typically found in a compound leaf of Hevea brasiliensis?
A) Five
B) Three
C) Seven
D) Nine
  • 8. What is the general shape of the leaflets of Hevea brasiliensis?
A) Circular
B) Ovate
C) Elliptical
D) Lanceolate
  • 9. Are rubber tree flowers typically large and showy?
A) Sometimes
B) No
C) Depends on the climate
D) Yes, they are large and brightly colored
  • 10. What type of climate do rubber trees thrive in?
A) Temperate
B) Arid
C) Arctic
D) Tropical
  • 11. What is the tapping process for rubber extraction?
A) Removing a branch
B) Burning the leaves
C) Incising the bark
D) Pulling out the roots
  • 12. What is the purpose of tapping a rubber tree?
A) To prune the tree
B) To stimulate growth
C) To collect latex
D) To fertilize the tree
  • 13. What is the name of the fruit produced by the Hevea brasiliensis tree?
A) Pome
B) Drupe
C) Capsule
D) Berry
  • 14. What is the texture of the bark of a mature Hevea brasiliensis tree?
A) Rough
B) Smooth
C) Scaly
D) Spiky
  • 15. What is a common pest affecting rubber trees?
A) Caterpillars
B) Grasshoppers
C) Aphids
D) Leaf blight
  • 16. In what type of soil do rubber trees generally grow best?
A) Sandy
B) Well-drained
C) Clay
D) Waterlogged
  • 17. What is the significance of clonal propagation in rubber tree cultivation?
A) Maintaining desirable traits
B) Increasing pest susceptibility
C) Slowing growth
D) Reducing yield
  • 18. What is the average height of a mature rubber tree?
A) 5-10 meters
B) 25-40 meters
C) 50-60 meters
D) 10-20 meters
  • 19. What is a 'tapping panel' on a rubber tree?
A) The root system
B) A type of fertilizer
C) The area where latex is extracted
D) The canopy of the tree
  • 20. Which country is the largest producer of natural rubber?
A) Malaysia
B) India
C) Indonesia
D) Thailand
  • 21. What is the approximate lifespan of a commercially productive rubber tree?
A) 25-30 years
B) 50-60 years
C) 10-15 years
D) 5-10 years
  • 22. What is the seed dispersal mechanism of Hevea brasiliensis?
A) Water
B) Explosive
C) Wind
D) Animal
  • 23. What does 'drought stress' refer to in rubber tree cultivation?
A) Lack of water
B) Excessive sunlight
C) Pest infestation
D) Nutrient deficiency
  • 24. What is 'coagulation' in the context of rubber latex?
A) Solidification of latex
B) Bleaching of latex
C) Dilution of latex
D) Filtering of latex
  • 25. Which of these is NOT a common use of natural rubber?
A) Gloves
B) Tires
C) Adhesives
D) Paper production
  • 26. What is the role of ammonia in latex preservation?
A) Adding strength
B) Improving color
C) Accelerating coagulation
D) Preventing coagulation
  • 27. What is the term for replanting rubber trees after the previous ones are no longer productive?
A) Succession
B) Deforestation
C) Afforestation
D) Rehabilitation
  • 28. What is bud grafting?
A) Removing buds from a plant
B) Spraying buds with fertilizer
C) Attaching a bud to another plant
D) Planting buds directly in soil
  • 29. What is the importance of fertilizer in rubber tree cultivation?
A) Promote healthy growth
B) Increase soil erosion
C) Attract pests
D) Prevent latex production
  • 30. What is the function of cover crops in rubber plantations?
A) Increasing water runoff
B) Attracting pests
C) Slowing tree growth
D) Suppressing weeds and improving soil
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