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