How to Identify and Classify Shrimp
  • 1. What is the primary body section that distinguishes shrimp from other crustaceans?
A) Large claws
B) Lack of antennae
C) Flattened body
D) Elongated abdomen with swimming pleopods
  • 2. Which feature is NOT typically used to classify shrimp?
A) Presence of rostrum teeth
B) Gill structure
C) Eye color
D) Shape of telson
  • 3. What is the rostrum?
A) The tail fan
B) The internal skeleton
C) The walking legs
D) The spine projecting from the head
  • 4. Penaeid shrimp are characterized by having...
A) Lamellar gills
B) External gills
C) No gills
D) Branched gills
  • 5. Caridean shrimp are characterized by having...
A) No gills
B) Branched gills
C) Lamellar gills
D) External gills
  • 6. Which is a common identifying characteristic of Penaeid shrimp?
A) A very short rostrum
B) No rostrum
C) Rostrum with teeth only on the dorsal side
D) Rostrum with teeth both dorsal and ventral
  • 7. Which is a common identifying characteristic of Caridean shrimp?
A) Rostrum with teeth both dorsal and ventral
B) A very short rostrum
C) Rostrum typically with teeth only on the dorsal side
D) No rostrum
  • 8. What are pleopods used for?
A) Swimming
B) Walking
C) Grasping prey
D) Digging
  • 9. What is the telson?
A) The central part of the tail fan
B) A walking leg
C) The heart
D) An antenna
  • 10. Why is gill structure important for shrimp classification?
A) It indicates the shrimp's diet
B) It differentiates between Penaeid and Caridean shrimp
C) It is related to the shrimp's color
D) It determines the shrimp's swimming speed
  • 11. Which family do tiger prawns belong to?
A) Palaemonidae
B) Alpheidae
C) Caridae
D) Penaeidae
  • 12. Which of these is a Caridean shrimp?
A) Whiteleg Shrimp
B) Pink Shrimp
C) Cleaner Shrimp
D) Brown Shrimp
  • 13. What type of environment do many Caridean shrimp inhabit?
A) Polar regions
B) Deep sea vents
C) Freshwater or brackish water
D) Open ocean
  • 14. What is the function of the carapace?
A) Used for swimming
B) Protects the cephalothorax
C) Used for feeding
D) Used for sensing
  • 15. What are pereiopods?
A) Mouthparts
B) Antennae
C) Swimming legs
D) Walking legs
  • 16. Which is the primary way shrimp osmoregulate?
A) Exoskeleton
B) Antennae
C) Gills
D) Heart
  • 17. What is the function of uropods?
A) Used for feeding
B) Used for walking
C) Help form the tail fan for swimming
D) Used for sensing chemicals
  • 18. What does the term 'decapod' refer to?
A) Five legs
B) Ten legs
C) No legs
D) Twelve legs
  • 19. What is the significance of the hepatic spines in shrimp classification?
A) They are present or absent depending on the species
B) They are always absent
C) They are always present
D) They determine swimming speed
  • 20. Which type of shrimp is known for its symbiotic relationships?
A) Caridean shrimp (some species)
B) Penaeid shrimp
C) All shrimp
D) No shrimp
  • 21. What is the most common commercial use of shrimp?
A) Medicine
B) Scientific research only
C) Food
D) Aquarium pets
  • 22. How are shrimp typically harvested?
A) Trawling
B) Bait traps only
C) Hand-picking only
D) Spearfishing
  • 23. What is the molting process in shrimp?
A) Hibernation
B) Regrowing lost limbs
C) Shedding of the exoskeleton
D) Changing color
  • 24. What is the meaning of the term 'benthic' when referring to shrimp?
A) Living on land
B) Living in freshwater
C) Living in the water column
D) Living on or near the seafloor
  • 25. The presence or absence of a postorbital spine can help classify shrimp. Where is it located?
A) Behind the eye
B) On the rostrum
C) On the walking legs
D) On the tail
  • 26. Which of the following characteristics is LEAST helpful in identifying shrimp species?
A) Arrangement of gills
B) Shape of the carapace
C) Number of rostrum teeth
D) Weight
  • 27. What is the primary food source for many shrimp species?
A) Detritus and small organisms
B) Large fish
C) Sunlight
D) Seaweed only
  • 28. What role do shrimp play in the marine ecosystem?
A) Only prey
B) Decomposers only
C) Both prey and predator
D) Only predator
  • 29. What is the function of the statocyst in shrimp?
A) Pumping blood
B) Smelling food
C) Seeing underwater
D) Balance and orientation
  • 30. What is a 'mysis' stage in shrimp development?
A) A molting stage
B) A reproductive stage
C) A larval stage
D) An adult stage
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