- Crustaceans belong to which phylum?
- A) Mollusca
- B) Annelida
- C) Arthropoda
- D) Echinodermata
Answer: C) Arthropoda
- Which of the following is NOT a characteristic of crustaceans?
- A) Jointed legs
- B) Hard exoskeleton
- C) Gills for respiration
- D) Presence of a notochord
Answer: D) Presence of a notochord
- The main body regions of crustaceans are the cephalothorax and:
- A) Abdomen
- B) Thorax
- C) Cephalus
- D) Body
Answer: A) Abdomen
- Which of the following is a common example of a crustacean?
- A) Earthworm
- B) Spider
- C) Crab
- D) Snail
Answer: C) Crab
- Crustaceans primarily reproduce through:
- A) Budding
- B) Binary fission
- C) External fertilization
- D) Internal fertilization
Answer: C) External fertilization
- What type of eyes do many crustaceans possess?
- A) Simple eyes
- B) Compound eyes
- C) Ocelli
- D) No eyes
Answer: B) Compound eyes
- Which of the following classes is NOT part of the subphylum Crustacea?
- A) Malacostraca
- B) Branchiopoda
- C) Cirripedia
- D) Insecta
Answer: D) Insecta
- Which of the following is a feature of the class Malacostraca?
- A) They have a segmented body with a carapace.
- B) They are exclusively aquatic.
- C) They do not have appendages.
- D) They lack gills.
Answer: A) They have a segmented body with a carapace.
- The larval stage of crustaceans is typically called:
- A) Nauplius
- B) Zoea
- C) Mezoic
- D) Polyp
Answer: A) Nauplius
- Which crustacean is known for its ability to regenerate lost limbs?
- A) Lobster
- B) Barnacle
- C) Shrimp
- D) Crab
Answer: D) Crab
- Crustaceans breathe primarily through:
- A) Lungs
- B) Gills
- C) Skin
- D) Spiracles
Answer: B) Gills
- What is the primary diet of most crustaceans?
- A) Herbivorous
- B) Carnivorous
- C) Omnivorous
- D) Detritivorous
Answer: C) Omnivorous
- Which structure in crustaceans is responsible for locomotion?
- A) Antennae
- B) Carapace
- C) Legs
- D) Abdomen
Answer: C) Legs
- The hard outer shell of crustaceans is made of:
- A) Calcium carbonate
- B) Chitin
- C) Protein
- D) Cellulose
Answer: B) Chitin
- Which of the following is a feature of the class Branchiopoda?
- A) Primarily marine
- B) Mostly freshwater
- C) Possess a carapace
- D) Have specialized gills
Answer: B) Mostly freshwater
- Which crustaceans are known for their filter-feeding behavior?
- A) Shrimp
- B) Lobsters
- C) Barnacles
- D) Crabs
Answer: C) Barnacles
- What is the function of the antennules in crustaceans?
- A) Locomotion
- B) Sensory perception
- C) Digestion
- D) Respiration
Answer: B) Sensory perception
- The class Cirripedia includes which of the following?
- A) Lobsters
- B) Barnacles
- C) Shrimps
- D) Crabs
Answer: B) Barnacles
- Crustaceans exhibit a process called ecdysis, which means:
- A) Eating
- B) Molting
- C) Breathing
- D) Swimming
Answer: B) Molting
- Which of the following is a common use of crustaceans in human diets?
- A) Only as pets
- B) As a source of protein
- C) For decoration
- D) As fertilizers
Answer: B) As a source of protein
- Which class includes the largest marine arthropods?
- A) Ostracoda
- B) Malacostraca
- C) Maxillopoda
- D) Branchiopoda
Answer: B) Malacostraca
- The exoskeleton of crustaceans serves all of the following functions EXCEPT:
- A) Protection
- B) Water retention
- C) Nutrient absorption
- D) Structural support
Answer: C) Nutrient absorption
- What is the primary habitat of the majority of crustaceans?
- A) Freshwater
- B) Terrestrial
- C) Marine
- D) Arboreal
Answer: C) Marine
- Which crustacean is known for its role in aquaculture?
- A) Lobster
- B) Daphnia
- C) Crab
- D) Shrimp
Answer: D) Shrimp
- The class Ostracoda is commonly known as:
- A) Barnacles
- B) Seed shrimp
- C) Copepods
- D) Isopods
Answer: B) Seed shrimp
- Which structure is primarily responsible for feeding in barnacles?
- A) Legs
- B) Gills
- C) Mouthparts
- D) Antennae
Answer: C) Mouthparts
- In crustaceans, the term “carapace” refers to:
- A) The flexible abdomen
- B) The hard shell covering the cephalothorax
- C) The appendages
- D) The eyes
Answer: B) The hard shell covering the cephalothorax
- Which of the following crustaceans is a common aquarium species?
- A) Lobster
- B) Daphnia
- C) Crab
- D) Barnacle
Answer: B) Daphnia
- Crustaceans possess specialized appendages known as:
- A) Tarsi
- B) Claws
- C) Palps
- D) Both B and C
Answer: D) Both B and C
- The majority of crustaceans are:
- A) Terrestrial
- B) Freshwater
- C) Marine
- D) Parasitic
Answer: C) Marine