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