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