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