How to Identify and Classify Mangrove Trees
  • 1. What is the primary habitat of mangrove trees?
A) Deserts
B) Coastal intertidal zones
C) Freshwater lakes
D) High altitude mountains
  • 2. Which adaptation is most common in mangrove trees for surviving in saline environments?
A) Extensive root systems in freshwater
B) Salt excretion through leaves
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) Fibrous roots
C) Prop roots
D) Tap roots
  • 4. Black mangroves typically excrete salt through:
A) Fruit
B) Roots
C) Bark
D) Salt glands in leaves
  • 5. Pneumatophores are characteristic of which type of mangrove?
A) Black mangroves
B) Buttonwood mangroves
C) Red mangroves
D) White 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) Needle-like
C) Elliptical
D) Rounded
  • 8. The propagules of red mangroves are:
A) Berries
B) Small, round seeds
C) Winged seeds
D) Long, pencil-shaped seedlings
  • 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) Root system
B) Salt excretion method
C) Leaf shape
D) Soil pH level
  • 11. The position of mangroves in relation to the tide is called?
A) Zonation
B) Succession
C) Stratification
D) Mitigation
  • 12. Red mangroves are typically found in which zone?
A) The landward zone
B) The most seaward zone
C) The mid-zone
D) The zone with the least salinity
  • 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) A thick waxy coating on their leaves
C) Extensive root systems
D) Small leaves
  • 15. Why are mangroves important for coastal ecosystems?
A) They provide habitat for many species
B) They block sunlight from reaching the water
C) They increase erosion
D) They acidify the soil
  • 16. What is the scientific name for the Red Mangrove?
A) Avicennia germinans
B) Conocarpus erectus
C) Laguncularia racemosa
D) Rhizophora mangle
  • 17. What is the scientific name for the Black Mangrove?
A) Rhizophora mangle
B) Conocarpus erectus
C) Avicennia germinans
D) Laguncularia racemosa
  • 18. What is the scientific name for the White Mangrove?
A) Avicennia germinans
B) Rhizophora mangle
C) Laguncularia racemosa
D) Conocarpus erectus
  • 19. What is the scientific name for the Buttonwood Mangrove?
A) Rhizophora mangle
B) Laguncularia racemosa
C) Avicennia germinans
D) Conocarpus erectus
  • 20. What color is the flower of the red mangrove?
A) Purple
B) Yellowish-white
C) Blue
D) Red
  • 21. What is a key identifying characteristic of White Mangrove leaves?
A) Sharp points
B) Two salt excreting glands at the base of the leaf blade
C) Waxy upper surface
D) Hairy undersides
  • 22. What is the term for a mangrove's ability to tolerate varying degrees of salinity?
A) Mesophytic
B) Xerophytic
C) Hydrophytic
D) Halophytic
  • 23. Where do mangroves get their nutrients?
A) From the air
B) From other trees
C) From insects
D) From the water and sediment
  • 24. What is the shape of black mangrove leaves?
A) Circular
B) Oblong
C) Heart-shaped
D) Needle-like
  • 25. How do mangroves help prevent coastal erosion?
A) Their root systems trap sediment.
B) They release chemicals that harden the sand
C) Their leaves block wind and rain
D) They attract seabirds that stabilize the shore
  • 26. Which mangrove species has round leaves?
A) Buttonwood
B) White Mangrove
C) Red Mangrove
D) Black Mangrove
  • 27. What is the color of the bark of a mature Red Mangrove?
A) Black
B) Reddish-brown
C) Green
D) Gray
  • 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) White Mangrove
B) Black Mangrove
C) Buttonwood
D) Red 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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