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How to Identify and Classify Watercresses
Contributed by: Woolley
  • 1. Which habitat is MOST suitable for watercress growth?
A) Shallow, flowing, nutrient-rich water
B) Dry, sandy soil
C) Deep, stagnant lakes
D) Dense forests
  • 2. What is the typical leaf shape of watercress?
A) Needle-like
B) Palmately compound
C) Simple and oval
D) Pinnately compound
  • 3. What type of root system does watercress have?
A) Tuberous
B) Aerial
C) Fibrous
D) Taproot
  • 4. What is the scientific name for common watercress?
A) Brassica oleracea
B) Nasturtium officinale
C) Allium sativum
D) Solanum lycopersicum
  • 5. What color are typical watercress flowers?
A) Blue
B) Yellow
C) Red
D) White
  • 6. Watercress belongs to which plant family?
A) Asteraceae
B) Lamiaceae
C) Brassicaceae
D) Rosaceae
  • 7. Which characteristic is MOST helpful in distinguishing watercress from similar plants?
A) Peppery taste
B) Stem length
C) Root depth
D) Leaf size
  • 8. Which environmental factor can influence watercress growth the MOST?
A) Humidity
B) Soil pH (if growing aquaponically)
C) Air pressure
D) Water quality
  • 9. What type of stem does watercress have?
A) Woody
B) Spiny
C) Solid
D) Hollow
  • 10. How is watercress typically propagated?
A) Stem cuttings
B) Leaf cuttings
C) Root division
D) Seeds
  • 11. What season is generally best for watercress growth?
A) Winter (freezing temperatures)
B) Summer (hot temperatures)
C) Spring/Fall (cooler temperatures)
D) All seasons equally
  • 12. Watercress is a good source of which vitamin?
A) Vitamin A
B) Vitamin K
C) Vitamin B12
D) Vitamin D
  • 13. If watercress has yellow leaves, what could be the MOST likely problem?
A) Too much sunlight
B) Insect infestation
C) Overwatering
D) Nutrient deficiency
  • 14. How does watercress spread naturally?
A) Wind dispersal
B) Animal dispersal
C) Explosive seed pods
D) Vegetative growth
  • 15. What is the best way to harvest watercress?
A) Only harvest the roots
B) Wait for the plant to flower then harvest
C) Pull the entire plant out of the water
D) Cut stems above the water line
  • 16. When harvesting watercress from the wild, what is the most important factor to consider?
A) Water source cleanliness
B) Leaf size
C) Flower color
D) Root length
  • 17. What is a key characteristic of the taste of watercress?
A) Sweet
B) Sour
C) Bitter
D) Peppery
  • 18. Which of these locations would be LEAST suitable for finding wild watercress?
A) A natural spring
B) A clear, flowing river
C) A slow-moving stream
D) A desert oasis
  • 19. How should freshly harvested watercress be stored?
A) In a damp paper towel in the refrigerator
B) In a dry bag at room temperature
C) Exposed to direct sunlight
D) Submerged in water
  • 20. What other plant could be easily confused with watercress if not careful?
A) Mint
B) Parsley
C) Creeping buttercup
D) Basil
  • 21. What insect might be seen on watercress?
A) Aphids
B) Bees
C) Grasshoppers
D) Ladybugs
  • 22. What does 'officinale' mean in the watercress scientific name?
A) Edible
B) Medicinal
C) Aquatic
D) Beautiful
  • 23. Watercress is often used raw in salads. Why is this possible?
A) The leaves are tender and have a mild flavor.
B) Cooking destroys its health benefits.
C) It is toxic when cooked.
D) The roots are the most nutritious part.
  • 24. What type of light is best for growing watercress?
A) Artificial light only
B) Full sun
C) Full shade
D) Partial shade
  • 25. What is a sign of overharvesting watercress?
A) More vibrant color
B) Reduced growth rate
C) Increased flower production
D) Larger leaf size
  • 26. Which of the following is NOT a common use for watercress?
A) Making paper
B) Garnish
C) Soups
D) Salads
  • 27. What should you do if you find snails on your watercress?
A) Spray with insecticide
B) Leave them; they are beneficial
C) Remove them manually
D) Flush the plant with hot water
  • 28. What is one of the greatest threats to wild watercress populations?
A) Habitat destruction
B) Over-consumption
C) Too much rain
D) Lack of sunlight
  • 29. Why is flowing water important for watercress growth?
A) It provides oxygen and nutrients
B) It keeps the water warm
C) It prevents algae growth
D) It washes away pests
  • 30. Besides the leaves, which other part of the watercress plant is edible?
A) Seeds
B) Stems
C) Flowers
D) Roots
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