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