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Olive - Quiz
Contributed by: Leonard
  • 1. Why is dendrochronology difficult to use on olive trees?
A) The trees are too young
B) Irregular growth patterns
C) Rapid decomposition of bark
D) Lack of tree rings
  • 2. What is a major obstacle when dating olive trees using tree rings?
A) Lack of scientific interest
B) Inconsistent oxygen levels
C) Missing annual tree rings
D) Extreme tree height
  • 3. What feature of an olive tree interior makes dating difficult?
A) Hollowed-out interiors
B) Liquid-filled centers
C) Solid core wood
D) High levels of sap
  • 4. According to the text, what is an imperfect method for inferring the age of an olive tree?
A) Counting the leaves
B) Frequency of pruning
C) Measuring the diameter
D) Color of the olives
  • 5. What is the claimed age of the Oliveira do Mouchão tree in Portugal?
A) 500 years
B) 3,350 years
C) 700 years
D) 1,000 years
  • 6. Which two methods are combined to determine the maximum age of olive trees?
A) Soil analysis and leaf count
B) Climatic study and height measurement
C) Tree-ring and radiocarbon dating
D) GPS mapping and trunk thickness
  • 7. How many hectares were occupied by olive groves as of 2024?
A) 9.6 million
B) 11.6 million
C) 2.5 million
D) 28.6 million
  • 8. What percentage of the world's permanent cultivated area do olive groves occupy?
A) Two thirds
B) A quarter
C) A tenth
D) Half
  • 9. Which crops commanded more space than olive trees in 2011?
A) Wheat and corn
B) Apples and bananas
C) Coconut trees and oil palms
D) Mangoes and grapes
  • 10. What percentage of the world's olives are produced by the 10 leading Mediterranean countries?
A) 95%
B) 75%
C) 60%
D) 25%
  • 11. Which country is the world's leading producer of olives?
A) Tunisia
B) Greece
C) Italy
D) Spain
  • 12. In Italy, where does the majority of olive production occur?
A) The islands
B) The mountains
C) The south
D) The north
  • 13. What percentage of the global olive oil supply does Spain produce?
A) 60%
B) 25%
C) 95%
D) 10%
  • 14. What percentage of the world's olive oil is produced by the European Union?
A) Nearly 60%
B) 15%
C) 25%
D) 95%
  • 15. Which of the following factors affects an olive tree's size and length?
A) The name of the cultivar
B) Soil fertility
C) The number of farmers
D) The type of oil produced
  • 16. What is the botanical name of the cultivated olive?
A) Olea sativa
B) Olea europaea subsp. europaea
C) Olea mediterranea
D) Olea oleaster
  • 17. To which plant family does the olive belong?
A) Oleaceae
B) Rosaceae
C) Fabaceae
D) Rutaceae
  • 18. Botanically, how is the olive fruit classified?
A) Berry
B) Drupe
C) Pome
D) Hesperidium
  • 19. Approximately what percentage of harvested olives are processed into oil?
A) 80%
B) 50%
C) 20%
D) 95%
  • 20. What is the name for the hard center of an olive in American English?
A) Shell
B) Seed
C) Kernel
D) Pit
  • 21. What does the olive branch symbolize?
A) Victory
B) Wisdom
C) Prosperity
D) Peace
  • 22. In the Linear B syllabic script, what is a Mycenaean word for olive?
A) e-lai-on
B) o-li-va
C) e-ra-wa
D) o-le-um
  • 23. What was olive oil formerly used for besides food?
A) Skin moisturizer
B) Lamp fuel
C) Paint solvent
D) Cleaning agent
  • 24. What color are the leaves of the olive tree on the underside?
A) Yellowish
B) Whitish
C) Brown
D) Dark green
  • 25. From which language does the word 'olive' derive?
A) Spanish
B) Arabic
C) Hebrew
D) Latin
  • 26. What is the typical maximum height mentioned for an olive tree?
A) 5 m
B) 15 m
C) 20 m
D) 10 m
  • 27. How many countries currently produce olive oil?
A) 58
B) 66
C) 45
D) 20
  • 28. Where were olives used by humans approximately 100,000 years ago?
A) Japan
B) Morocco
C) Italy
D) Argentina
  • 29. In what year were olive trees introduced to Japan?
A) 1950
B) 1985
C) 1908
D) 1700
  • 30. What type of soil do olive trees prefer?
A) Peat
B) Calcareous
C) Clay
D) Sandy
  • 31. What happens to olive trees in temperatures below -10 °C?
A) They produce more oil
B) They thrive
C) They stop needing water
D) They may be injured
  • 32. Which ancient figure noted that olive trees in rich soils produce poor-quality oil?
A) Homer
B) Aristotle
C) Julius Caesar
D) Pliny the Elder
  • 33. What is the primary reason for the olive tree's geographic expansion?
A) Volcanic activity
B) Natural seed dispersal
C) Climate change
D) Human activity
  • 34. What must be done to olive trees grown from seeds or suckers to ensure good yields?
A) Shading
B) Budding or grafting
C) Soil acidification
D) Constant watering
  • 35. What event in Tuscany caused severe damage to olive trees in 1985?
A) Severe frost
B) Flood
C) Pest infestation
D) Drought
  • 36. What is the result if the above-ground part of an olive tree dies due to extreme cold?
A) The rootstock can produce new shoots
B) The tree requires immediate replanting
C) The tree dies completely
D) The tree becomes sterile
  • 37. How many olive cultivars are there approximately?
A) Dozens
B) Hundreds
C) Thousands
D) Ten
  • 38. What is the primary factor that influences an olive's color, size, and shape?
A) Its water intake
B) Its age
C) Its soil type
D) Its cultivar
  • 39. Why are olive trees often planted in pairs?
A) To overcome self-incompatibility
B) To save space
C) To increase sunlight exposure
D) To prevent wind damage
  • 40. Which insect lays its eggs in the olive fruit?
A) European starling
B) Olive moth
C) Olive fruit fly
D) Meadow spittlebug
  • 41. Which pest forms mines inside olive leaves in the spring?
A) Red fox
B) Meadow spittlebug
C) Olive moth caterpillar
D) Olive fruit fly
  • 42. What disease does the fungus Spilocaea oleaginea cause?
A) Tumour growth
B) Olive peacock spot
C) Verticillium wilt
D) Quick decline syndrome
  • 43. What bacterium induces tumor growth in olive shoots?
A) Spilocaea oleaginea
B) Pseudomonas savastanoi pv. oleae
C) Xylella fastidiosa
D) Bactrocera oleae
  • 44. Which insect is the main vector for Xylella fastidiosa?
A) Olive fruit fly
B) Olive moth
C) European starling
D) Meadow spittlebug
  • 45. What crop typically replaces olives in the colder Mediterranean hinterland?
A) Grapes
B) Citrus fruit
C) Sweet chestnut
D) Apples
  • 46. Which animal spreads olive seeds in South Australia?
A) Emu
B) All of the above
C) Red fox
D) European starling
  • 47. When are olives typically harvested in the Mediterranean?
A) Summer
B) Autumn
C) Spring
D) Winter
  • 48. What is the common way to harvest olives by 'milking'?
A) Using a net on the ground
B) Using a sack tied around the waist
C) Using a mechanical shaker
D) Using a motorized saw
  • 49. Why is hand harvesting used in places like Italy and Greece?
A) The terrain is too mountainous for machines
B) It is faster
C) It is cheaper
D) The trees are too small for machines
  • 50. What is a benefit of harvesting by hand?
A) The fruit becomes larger
B) It increases the number of trees
C) The fruit is not bruised
D) The harvest season lasts longer
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