Betula pendula - Quiz
Betula pendula
  • 1. What type of canopy does the silver birch have?
A) Layered canopy
B) Dense canopy
C) Open canopy
D) Evergreen canopy
  • 2. Which of these flowering plants is found in birch woods?
A) Tulip
B) Sunflower
C) Rose
D) Primrose
  • 3. Which shrub is commonly found on the floor of a birch forest?
A) Boxwood
B) Blaeberry
C) Ivy
D) Holly
  • 4. What causes the 'witch's brooms' on silver birch branches?
A) Taphrina betulina
B) Amanita muscaria
C) Agrilus anxius
D) Fomitopsis betulina
  • 5. Which fungus is responsible for killing old birch trees?
A) Cantharellus cibarius
B) Taphrina betulina
C) Leccinum scabrum
D) Fomitopsis betulina
  • 6. Which fungus maintains a mutualistic relationship with the silver birch?
A) Fomitopsis betulina
B) Amanita muscaria
C) Agrilus anxius
D) Taphrina betulina
  • 7. What kind of soil condition particularly encourages the birch-mycorrhizal relationship?
A) Sandy beach soil
B) Alkaline and rich soil
C) Acidic or nutrient-poor soil
D) Waterlogged soil
  • 8. Which insect is a major pest for birch trees in the United States?
A) Green woodpecker
B) Willow warbler
C) Redpoll
D) Bronze birch borer
  • 9. What is the conservation status of Betula pendula on the IUCN Red List?
A) Least concern
B) Extinct
C) Vulnerable
D) Endangered
  • 10. Approximately how many insect species were found on silver and downy birch in Germany?
A) Exactly 50
B) Almost 500
C) Almost 100
D) Over 1,000
  • 11. Which bird is noted as living in birch woodland?
A) Penguin
B) Flamingo
C) Ostrich
D) Chaffinch
  • 12. What assists the growth of the tree alongside mycorrhiza?
A) Additional fertilizers
B) Heavy rainfall
C) Microfauna
D) Large mammals
  • 13. What is the current status of Betula szaferi?
A) Extinct in the wild
B) A separate species
C) A hybrid of oak and birch
D) Considered a form of B. pendula
  • 14. How are naturally regenerated birch trees compared to planted ones regarding birch dieback?
A) More susceptible
B) Less susceptible
C) Equally susceptible
D) Immune to all disease
  • 15. Which mycorrhizal associate is listed in addition to Amanita muscaria?
A) Taphrina betulina
B) Agrilus anxius
C) Fomitopsis betulina
D) Leccinum scabrum
  • 16. What is the primary factor that allows silver birch seeds to disperse over long distances?
A) Wind
B) Gravity
C) Water
D) Animal consumption
  • 17. In the southern parts of its natural range, where is Betula pendula mainly found?
A) Mountainous regions
B) Tropical rainforests
C) Coastal plains
D) River valleys
  • 18. Which of the following describes the shoots of Betula pendula?
A) Hairless and warty
B) Hairless and smooth
C) Hairy and warty
D) Hairy and smooth
  • 19. What is the ploidy level of Betula pendula?
A) Diploid
B) Haploid
C) Tetraploid
D) Triploid
  • 20. What is the result of a hybrid between Betula pendula and Betula pubescens?
A) Sterile
B) Highly fertile
C) A distinct new species
D) More resistant to pollution
  • 21. In which US states is Betula pendula considered invasive?
A) Florida, Texas, and California
B) Alaska, Hawaii, and Oregon
C) New York, Maine, and Vermont
D) Kentucky, Maryland, Washington, and Wisconsin
  • 22. What is a distinguishing leaf characteristic of Betula pendula compared to Betula pubescens?
A) Heart shape with smooth margins
B) Ovoid shape with single serration
C) Needle-like shape
D) Triangular shape with double serration
  • 23. Why is Betula pendula suitable for industrial areas?
A) Tolerance to pollution
B) Deep taproot system
C) Resistance to drought
D) Ability to grow in complete shade
  • 24. How many subspecies of silver birch are currently accepted?
A) Two
B) Three
C) Five
D) Six
  • 25. Where is the subspecies Betula pendula subsp. szechuanica primarily found?
A) Northern Morocco
B) Eastern Europe
C) Western China
D) Siberia
  • 26. Which species is generally more tolerant of wet, poorly drained sites?
A) Betula pubescens
B) Betula mandshurica
C) Betula pendula
D) Betula szechuanica
  • 27. Which statement regarding the bark of Betula pendula is true?
A) It is smooth and yellow
B) It is whiter with scattered black fissures
C) It is greyer with very few fissures
D) It is dark brown and peeling
  • 28. Betula pendula has been introduced to which continent?
A) Antarctica
B) Australia
C) South America
D) North America
  • 29. What is the relationship between Betula pendula and Betula pubescens hybrids?
A) They are the dominant form
B) They are very common
C) They are very rare
D) They do not exist
  • 30. What environmental requirement distinguishes silver birch from downy birch in cool climates?
A) Requires higher moisture levels
B) Requires lower light intensity
C) Demands more summer warmth
D) Demands more winter cold
  • 31. Which of these is a rejected name that was once applied to Betula pendula?
A) Betula nigra
B) Betula alba L.
C) Betula lenta
D) Betula papyrifera
  • 32. Which geographic region does Betula pendula natively reach in the south?
A) South Africa
B) Southern Brazil
C) Northern Iran, Iraq, and Turkey
D) Central Australia
  • 33. Which family does Betula pendula belong to?
A) Rosaceae
B) Salicaceae
C) Betulaceae
D) Fagaceae
  • 34. How is the bark of the silver birch described when it is young?
A) Pure white
B) Dark and rugged
C) Black and scaly
D) Golden-brown
  • 35. What are the small, sticky structures on young branches called?
A) Spines
B) Glands
C) Resin warts
D) Thorns
  • 36. Are silver birch trees monoecious or dioecious?
A) Hermaphroditic
B) Monoecious
C) Dioecious
D) Parthenocarpic
  • 37. What characterizes the margin of a silver birch leaf?
A) Doubly serrate
B) Entire
C) Lobed
D) Smooth
  • 38. What chemical compound in the bark is noted for medicinal properties?
A) Triterpenes
B) Nicotine
C) Capsaicin
D) Caffeine
  • 39. How many pollen grains can one silver birch catkin produce on average?
A) 500,000
B) 100,000
C) 10 million
D) 1.66 million
  • 40. What type of tree is the silver birch in terms of succession?
A) Climax species
B) Shade-tolerant species
C) Understory species
D) Pioneer species
  • 41. In what season do female catkins develop?
A) Autumn
B) Winter
C) Summer
D) Spring
  • 42. What is the approximate maximum diameter of a silver birch trunk?
A) Over 1 meter
B) 2 meters
C) Under 40 cm
D) Exactly 10 cm
  • 43. Which of these is a known use for silver birch forest products?
A) Rubber production
B) Plywood
C) Silk production
D) Plastic manufacturing
  • 44. In the United States, what is the status of Betula pendula in some states?
A) Extinct
B) Invasive
C) Protected
D) Endangered
  • 45. For which characteristic is the silver birch often planted in gardens?
A) Deep red leaves
B) White bark
C) Nut production
D) High fruit yield
  • 46. Which of the following cities is mentioned as a place where silver birch is planted?
A) New York
B) Tokyo
C) Los Angeles
D) Moscow
  • 47. What is the heartwood color of the silver birch?
A) Deep green
B) Dark ebony
C) Bright yellow
D) Light reddish-brown
  • 48. Which of the following is made from silver birch wood?
A) Iron nails
B) Boat sails
C) Wine barrels
D) Parquet blocks
  • 49. What were strips of birch bark historically used for?
A) Roof support beams
B) Bast shoes
C) Window panes
D) Cooking vessels
  • 50. What was the bark of the silver birch historically used for in addition to handicrafts?
A) Making paper
B) Tanning
C) Dyeing clothes
D) Water purification
  • 51. What is the resin from the bark used for?
A) Food flavoring
B) Metal polish
C) Waterproof glue
D) Skin lotion
  • 52. Who expressed concern for the survival of woodlands due to bark removal?
A) Charles Darwin
B) Carl Linnaeus
C) John Muir
D) Gregor Mendel
  • 53. What is birch brushwood commonly used for?
A) Racecourse jumps
B) Animal bedding
C) Making paper
D) Building fences
  • 54. How can birch sap be processed?
A) Concentrated by evaporation
B) Ground into flour
C) Dried into crystals
D) Pressed into oil
  • 55. What are dead birch twigs useful for?
A) Making furniture
B) Roof shingles
C) Tanning leather
D) Kindling for outdoor fires
  • 56. Which of these is a major component found in the essential oil of Betula pendula buds?
A) Germacrene D
B) Betulin
C) Chlorophyll
D) Cellulose
  • 57. Approximately what percentage of δ-cadinene is found in the essential oil of Betula pendula buds?
A) 13%
B) 10%
C) 15%
D) 20%
  • 58. What is the brand name of the sublingual allergen extract derived from white birch used in Canada?
A) Itulatek
B) Betulinum
C) BirchVax
D) Allergenex
  • 59. Which medical condition is the combination of Betula pendula and Betula pubescens extracts approved to treat in Europe?
A) Epidermolysis bullosa
B) Conjunctivitis
C) Allergic rhinitis
D) Dermatitis
  • 60. What climate requirement is necessary for successful silver birch cultivation?
A) Tropical heat year-round
B) Occasional winter snowfall
C) Constant high humidity
D) Extreme desert dryness
  • 61. What is the Finnish name for the 'Carelica' cultivar?
A) Betula
B) Puun
C) Visakoivu
D) Silveri
  • 62. For what characteristic is 'Carelica' wood prized?
A) Decorative burled appearance
B) Smooth texture
C) Resistance to fire
D) Extreme flexibility
  • 63. Which cultivar is commonly misidentified as 'Dalecarlica'?
A) 'Purpurea'
B) 'Tristis'
C) 'Youngii'
D) 'Laciniata'
  • 64. What is a distinguishing physical feature of the 'Laciniata' cultivar?
A) Deeply incised leaves
B) No central leader
C) Dark purple leaves
D) Smooth gray trunk
  • 65. Which cultivar of Betula pendula is known for having dark purple leaves?
A) 'Purpurea'
B) 'Tristis'
C) 'Carelica'
D) 'Youngii'
  • 66. Which cultivar requires being grafted onto a standard stem of normal silver birch?
A) 'Carelica'
B) 'Youngii'
C) 'Laciniata'
D) 'Purpurea'
  • 67. What organization awards the 'agm' designation to specific cultivars?
A) Royal Horticultural Society
B) Canadian Forestry Service
C) World Forest Council
D) European Botanical Union
  • 68. What is the approximate percentage of α-copaene in the bud essential oil of Betula pendula?
A) 10%
B) 20%
C) 13%
D) 15%
  • 69. What condition might the Itulatek allergen extract treat in addition to allergic rhinitis?
A) Asthma
B) Epidermolysis bullosa
C) Psoriasis
D) Conjunctivitis
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