Tropical rainforest - Quiz
Tropical rainforest
  • 1. What is the typical height range of trees in the canopy layer?
A) 45–55 m
B) 10–20 m
C) 30–45 m
D) 70–80 m
  • 2. Which plants commonly grow as epiphytes in the canopy?
A) Conifers, ferns, and cactuses
B) Grass, shrubs, and bamboo
C) Mangroves, palms, and algae
D) Orchids, bromeliads, mosses and lichens
  • 3. How do epiphytic plants in the canopy obtain water and minerals?
A) From rain and debris collecting on supporting plants
B) From the soil beneath the trees
C) From parasitic roots in the trunk
D) From underground water reservoirs
  • 4. What is the estimated arthropod species richness of the tropical canopy?
A) 100 million
B) 20 million
C) 50 million
D) 5 million
  • 5. Which of these animals is mentioned as an inhabitant of the canopy layer?
A) Crowned eagle
B) Large flying fox
C) Three-toed sloth
D) King colobus
  • 6. What is the typical height range of trees in the emergent layer?
A) 45–55 m
B) 30–45 m
C) 80–100 m
D) 10–20 m
  • 7. What challenges must trees in the emergent layer withstand?
A) Hot temperatures and strong winds
B) Lack of sunlight and high pressure
C) Flooding and drought
D) Heavy snow and frost
  • 8. Which of these is identified as a tree species in the emergent layer?
A) Psittacus erithacus
B) Bryophyta
C) Orchidaceae
D) Dipteryx panamensis
  • 9. What is the role of gaps formed by collapsing trees in the rainforest?
A) They decrease the biodiversity of the area
B) They stop the growth of saplings
C) They prevent sunlight from reaching the floor
D) They allow for the establishment and growth of new trees
  • 10. What percentage of tree species at La Selva Biological Station depend on canopy openings?
A) 75%
B) 50%
C) 90%
D) 25%
  • 11. Where are tropical rainforests generally located?
A) Near the polar regions
B) Within high-altitude deserts
C) In temperate mountainous zones
D) Around and near the equator
  • 12. What are the three major climatic parameters defining an equatorial climate?
A) Temperature, rainfall, and dry season intensity
B) Solar radiation, cloud cover, and salinity
C) Altitude, latitude, and longitude
D) Wind speed, humidity, and soil pH
  • 13. According to Holdridge, what is the annual temperature requirement for a true tropical rainforest?
A) Exactly 20 degrees Celsius
B) Lower than 10 degrees Celsius
C) Greater than 24 degrees Celsius
D) Between 5 and 15 degrees Celsius
  • 14. What is the threshold for annual rainfall in a true tropical rainforest according to Holdridge?
A) Greater than 10 m
B) Exactly 0.5 m
C) Less than 1 m
D) Greater than 2 m
  • 15. What does the PET value of <0.25 represent in tropical ecosystem classification?
A) Productivity ecosystem temperature
B) Precipitation energy threshold
C) Potential evapotranspiration ratio
D) Plant evaporation total
  • 16. What is the minimum mean monthly temperature required for a tropical rainforest?
A) 25 °C
B) 10 °C
C) 18 °C
D) 20 °C
  • 17. What is the typical range of annual rainfall in tropical rainforests?
A) 3,500 mm to 5,000 mm
B) 500 mm to 1,000 mm
C) 1,750 mm to 3,000 mm
D) 1,000 mm to 1,500 mm
  • 18. What proportion of all living plant and animal species on Earth reside in rainforests?
A) One third
B) Two thirds
C) One quarter
D) Half
  • 19. What proportion of all flowering plants can be found in rainforests?
A) One tenth
B) One quarter
C) Two-thirds
D) Half
  • 20. How many insect species can be found in a single hectare of rainforest?
A) 42,000
B) 807
C) 313
D) 1,500
  • 21. What is identified as a major cause of species extinction in modern times?
A) Increased forest growth
B) Natural volcanic activity
C) Climate stabilization
D) Human-driven habitat destruction
  • 22. What process in the past acted as a driver of speciation in rainforests?
A) Habitat fragmentation
B) Pharmacy research
C) Heavy logging
D) Agricultural expansion
  • 23. What nickname is given to tropical rainforests due to their medicinal value?
A) World's largest pharmacy
B) Nature's laboratory
C) Green treasure chest
D) Lungs of the earth
  • 24. Which layer of the tropical rainforest contains towering trees?
A) Canopy layer
B) Emergent layer
C) Forest floor
D) Understory layer
  • 25. What is a major human activity threatening tropical rainforests?
A) Agricultural expansion
B) Organic farming
C) Scientific research
D) Urban tourism
  • 26. Which international program aims to curb deforestation?
A) Global Green Accord
B) Carbon Neutral Treaty
C) REDD+
D) Rainforest Protection Initiative
  • 27. What happens to light penetration on the tropical rainforest floor?
A) It is high
B) It is filtered by high-intensity sun
C) It is low
D) It is consistent
  • 28. Most tropical rainforests today are located on fragments of which ancient supercontinent?
A) Laurasia
B) Pangaea
C) Gondwana
D) Rodinia
  • 29. Which of the following is NOT one of the five major regions where tropical rainforests are found?
A) New Guinea
B) Northern Europe
C) Madagascar
D) Tropical America
  • 30. What is another name for moist seasonal tropical forests?
A) Várzea
B) Emergent forest
C) Tropical mixed forest
D) Cloud forest
  • 31. At what elevations are montane rainforests known as cloud forests?
A) Sea level
B) Higher elevations
C) Valleys
D) Lower elevations
  • 32. What is the name for tropical freshwater swamp forests in the Amazon basin?
A) Várzea
B) Understory
C) Cloud forest
D) Emergent layer
  • 33. Which animal is mentioned as inhabiting the forest floor?
A) Boa constrictor
B) Okapi
C) Poison dart frog
D) Leopard
  • 34. Why does plant and animal waste disappear quickly on the forest floor?
A) The soil absorbs the waste immediately
B) Warm, humid conditions promote rapid decay
C) Strong winds blow the waste away
D) Large animals consume the waste
  • 35. What types of organisms help decay waste on the forest floor?
A) Reptiles
B) Large mammals
C) Sunlight
D) Fungi
  • 36. What percentage of sunlight reaches the understory layer?
A) 15%
B) 5%
C) 25%
D) 2%
  • 37. What is a common adaptation of understory plants to low light?
A) Larger leaves
B) Lack of roots
C) Brightly colored flowers
D) Shorter stems
  • 38. Which animal is commonly found in the understory layer?
A) Sumatran rhinoceros
B) Leopard
C) Okapi
D) Tapir
  • 39. Which of the following is true regarding oxisols compared to ultisols?
A) Oxisols are better drained
B) Oxisols have higher clay content
C) Oxisols are nutrient-rich
D) Oxisols are young and unweathered
  • 40. What physical property of soil controls tree turnover rates?
A) Bauxite concentration
B) Physical properties
C) Phosphorus levels
D) Available nitrogen
  • 41. What industrial material is sometimes produced by the laterization process in oxisols?
A) Calcium carbonate
B) Phosphorus
C) Bauxite
D) Limestone
  • 42. Which region has the lowest primary productivity due to heavily weathered oxisols?
A) Western Amazon
B) Eastern Amazon
C) Volcanic Costa Rica
D) Andean foothills
  • 43. What primary nutrient limitation is common in tropical rainforest soils?
A) Phosphorus
B) Potassium
C) Calcium
D) Nitrogen
  • 44. What is the process of breaking down organic matter into inorganic forms usable by plants?
A) Leaching
B) Respiration
C) Photosynthesis
D) Decomposition
  • 45. What do microbial communities take up during the decomposition process?
A) Nitrogen
B) Carbon dioxide
C) Phosphorus
D) Oxygen
  • 46. What do microbial communities release during the decomposition process?
A) Phosphorus
B) Nitrogen
C) Carbon dioxide
D) Oxygen
  • 47. How can the rate of decomposition be measured?
A) By measuring carbon dioxide release
B) By measuring oxygen uptake
C) By measuring plant height
D) By measuring soil depth
  • 48. What is the driving force moving decomposable carbon from litter to soil?
A) Wind
B) Precipitation
C) Temperature
D) Sunlight
  • 49. How are nutrients released from decaying litter taken up by plants?
A) Through surface or ground waters
B) Through bark absorption
C) Through animal waste
D) Through direct atmospheric absorption
  • 50. What is defined as an ecological process changing community structure over time?
A) Deforestation
B) Speciation
C) Succession
D) Endemism
  • 51. Which of these is an example of a natural disturbance causing forest gaps?
A) Nutrient accumulation
B) Increased sunlight
C) Secondary growth
D) A fallen tree
  • 52. What are regenerating young successional forests called?
A) Secondary forests
B) Deforested zones
C) Primary climax forests
D) Ancient refuges
  • 53. What process allows species to coexist by utilizing different food sources or habitats?
A) Niche partitioning
B) Interspecific competition
C) Pleistocene refugia
D) Secondary succession
  • 54. Who developed the theory of Pleistocene refugia in 1969?
A) Jürgen Haffer
B) A group of Costa Rican scientists
C) Charles Darwin
D) Gregor Mendel
  • 55. According to the Pleistocene refugia theory, what separated rainforest patches?
A) High-speed winds
B) Human-made barriers
C) Large mountain ranges
D) Non-forest vegetation
  • 56. Why is the Pleistocene refugia theory subject to debate?
A) It ignores the role of human activity
B) It only applies to birds
C) Genetic evidence suggests speciation occurred earlier
D) It lacks clear definitions of species
  • 57. What do buttress roots collect to provide added nutrition?
A) Rainwater runoff only
B) Atmospheric nitrogen
C) Mineral dust
D) Leaf litter
  • 58. Which group of people in Borneo is known for a traditional headhunting culture?
A) Penan
B) Dayak
C) Mbuti
D) Lumad
  • 59. What is the primary reason food resources are dispersed in the rainforest?
A) Low soil fertility
B) Lack of sunlight
C) Excessive rainfall
D) High biological diversity
  • 60. Which of the following is an example of a high-value product traded by forest dwellers?
A) Hardwood timber
B) Honey
C) Rubber
D) Palm oil
  • 61. Which country reported 67 uncontacted tribes in 2007?
A) Peru
B) Brazil
C) Indonesia
D) Democratic Republic of the Congo
  • 62. Which hardwood species is specifically mentioned as being sought by loggers?
A) Oak
B) Pine
C) Ipe
D) Cedar
  • 63. Which of these is a name for a Central African Pygmy group?
A) Huaorani
B) Dayak
C) Mbuti
D) Lumad
  • 64. What is another name for swidden cultivation?
A) Terrace farming
B) Hydroponics
C) Industrial agriculture
D) Slash-and-burn
  • 65. What is a benefit of the traditional swidden practice of fallowing?
A) Eliminates forest pests
B) Preserves soil organic matter
C) Prevents timber loss
D) Increases rainfall
  • 66. What are Pygmy peoples in Southeast Asia often referred to as?
A) Negrito
B) Amerindians
C) Dayak
D) Lumad
  • 67. Which of the following is an indigenous group of the Amazon?
A) Yanomamö
B) Aka
C) Twa
D) Penan
  • 68. Which of these food items originated in tropical rainforests?
A) Yam
B) Corn
C) Wheat
D) Potato
  • 69. How many cultivated kinds of fruit have tropical forests supplied?
A) 251
B) 43
C) 250
D) 20
  • 70. What is the primary source of genetic variation used to evade new pest damage?
A) Resistant wild stock
B) Artificial fertilizers
C) Imported crop varieties
D) Laboratory gene editing
  • 71. When did tropical rainforests take up a third less carbon than they did in the 1990s?
A) 2015
B) 2019
C) 1985
D) 2020
  • 72. By which decade might a typical tropical forest become a carbon source?
A) 2060s
B) 2040s
C) 2050s
D) 2030s
  • 73. How can tourism revenue directly assist in habitat protection?
A) Government subsidies for crops
B) Corporate deforestation permits
C) Park-entrance fees
D) Subsidies for logging equipment
  • 74. What is a positive outcome of bringing people into closer contact with the environment through tourism?
A) Lowering of environmental awareness
B) Reduction in wildlife population
C) Replacement of native flora
D) Increased public appreciation
  • 75. In which region has tourism specifically had a notable positive effect on wildlife preservation?
A) Antarctica
B) Europe
C) North America
D) Africa
  • 76. How many tree species with edible fruits are found in New Guinea alone?
A) 20
B) 250
C) 43
D) 251
  • 77. What is considered a non-extractive use of rainforests?
A) Logging
B) Yam farming
C) Ecosystem services
D) Sugarcane production
  • 78. Which precious metal is mentioned as being extracted from underneath rainforests?
A) Iron
B) Platinum
C) Copper
D) Gold
  • 79. What percentage of Ghana's original rainforest remains after decades of mining?
A) 25%
B) 5%
C) 50%
D) 12%
  • 80. What percentage of the typical Yanomamo diet comes from farmed plants?
A) 50%
B) 75%
C) 20%
D) 90%
  • 81. What is suggested to allow secondary forest to grow and replenish the soil?
A) Constant cultivation
B) Fallow periods
C) Frequent irrigation
D) Chemical fertilization
  • 82. What is the main conflict mentioned regarding agricultural land use?
A) The government versus the police
B) Urbanization versus rural expansion
C) Livestock farming versus crop farming
D) Individual farmers' needs versus global needs
  • 83. What are species with specialized feeding habits less likely to do when their prey population declines?
A) Migrate to new continents
B) Change their reproductive cycle
C) Increase their territory size
D) Use alternative resources
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