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How to Identify and Classify Mangrove Trees
Contributed by: Crossley
  • 1. What is the primary habitat of mangrove trees?
A) Deserts
B) High altitude mountains
C) Freshwater lakes
D) Coastal intertidal zones
  • 2. Which adaptation is most common in mangrove trees for surviving in saline environments?
A) Thick bark for insulation
B) Extensive root systems in freshwater
C) Needle-like leaves to conserve water
D) Salt excretion through leaves
  • 3. What type of root system is characteristic of red mangroves?
A) Fibrous roots
B) Prop roots
C) Tap roots
D) Aerial roots, but not prop roots
  • 4. Black mangroves typically excrete salt through:
A) Roots
B) Salt glands in leaves
C) Bark
D) Fruit
  • 5. Pneumatophores are characteristic of which type of mangrove?
A) Buttonwood mangroves
B) White mangroves
C) Red mangroves
D) Black mangroves
  • 6. White mangroves are often found:
A) On steep slopes
B) Exclusively in freshwater areas
C) Landward of red and black mangroves
D) Seaward of red and black mangroves
  • 7. Which leaf shape is most commonly associated with red mangroves?
A) Heart-shaped
B) Elliptical
C) Rounded
D) Needle-like
  • 8. The propagules of red mangroves are:
A) Long, pencil-shaped seedlings
B) Small, round seeds
C) Winged seeds
D) Berries
  • 9. What is viviparity in mangrove trees?
A) Seed germination while still attached to the parent tree
B) Production of multiple flowers
C) Resistance to fungal diseases
D) Rapid growth rate
  • 10. Which of these is NOT a typical characteristic used to identify mangrove species?
A) Root system
B) Salt excretion method
C) Soil pH level
D) Leaf shape
  • 11. The position of mangroves in relation to the tide is called?
A) Mitigation
B) Zonation
C) Stratification
D) Succession
  • 12. Red mangroves are typically found in which zone?
A) The zone with the least salinity
B) The most seaward zone
C) The landward zone
D) The mid-zone
  • 13. Which of the following is a key adaptation of mangrove roots?
A) Anaerobic soil tolerance
B) Resistance to herbivory
C) Attraction of pollinators
D) High nitrogen uptake
  • 14. What adaptation helps mangroves handle wave action?
A) Small leaves
B) A thick waxy coating on their leaves
C) Extensive root systems
D) Brightly colored flowers
  • 15. Why are mangroves important for coastal ecosystems?
A) They increase erosion
B) They provide habitat for many species
C) They block sunlight from reaching the water
D) They acidify the soil
  • 16. What is the scientific name for the Red Mangrove?
A) Conocarpus erectus
B) Rhizophora mangle
C) Avicennia germinans
D) Laguncularia racemosa
  • 17. What is the scientific name for the Black Mangrove?
A) Laguncularia racemosa
B) Rhizophora mangle
C) Conocarpus erectus
D) Avicennia germinans
  • 18. What is the scientific name for the White Mangrove?
A) Rhizophora mangle
B) Avicennia germinans
C) Laguncularia racemosa
D) Conocarpus erectus
  • 19. What is the scientific name for the Buttonwood Mangrove?
A) Laguncularia racemosa
B) Avicennia germinans
C) Rhizophora mangle
D) Conocarpus erectus
  • 20. What color is the flower of the red mangrove?
A) Red
B) Purple
C) Blue
D) Yellowish-white
  • 21. What is a key identifying characteristic of White Mangrove leaves?
A) Sharp points
B) Waxy upper surface
C) Hairy undersides
D) Two salt excreting glands at the base of the leaf blade
  • 22. What is the term for a mangrove's ability to tolerate varying degrees of salinity?
A) Hydrophytic
B) Halophytic
C) Mesophytic
D) Xerophytic
  • 23. Where do mangroves get their nutrients?
A) From the air
B) From insects
C) From the water and sediment
D) From other trees
  • 24. What is the shape of black mangrove leaves?
A) Oblong
B) Heart-shaped
C) Needle-like
D) Circular
  • 25. How do mangroves help prevent coastal erosion?
A) They release chemicals that harden the sand
B) Their leaves block wind and rain
C) They attract seabirds that stabilize the shore
D) Their root systems trap sediment.
  • 26. Which mangrove species has round leaves?
A) Black Mangrove
B) Buttonwood
C) White Mangrove
D) Red Mangrove
  • 27. What is the color of the bark of a mature Red Mangrove?
A) Black
B) Gray
C) Reddish-brown
D) Green
  • 28. What is the primary role of pneumatophores?
A) To facilitate gas exchange
B) To store nutrients
C) To anchor the tree in the mud
D) To absorb water
  • 29. Which mangrove species is most sensitive to frost?
A) Buttonwood
B) Red Mangrove
C) Black Mangrove
D) White Mangrove
  • 30. What type of fruit does the buttonwood mangrove produce?
A) A capsule
B) A pod
C) A cone-like fruit
D) A berry
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