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- Which of the following is the largest class within the phylum Mollusca?
- A) Bivalvia
- B) Cephalopoda
- C) Gastropoda
- D) Polyplacophora
Answer: C) Gastropoda
- Gastropods are characterized by which of the following features?
- A) Two shells
- B) Single, usually spiraled shell
- C) Lack of shell
- D) Radula
Answer: B) Single, usually spiraled shell
- What type of symmetry do adult gastropods typically exhibit?
- A) Bilateral symmetry
- B) Radial symmetry
- C) Asymmetry
- D) None of the above
Answer: C) Asymmetry
- The process of torsion in gastropods results in:
- A) A bilateral body plan
- B) A twisting of the body
- C) Loss of the shell
- D) Development of a foot
Answer: B) A twisting of the body
- What is the primary feeding structure in gastropods?
- A) Jaws
- B) Radula
- C) Tentacles
- D) Beak
Answer: B) Radula
- Which of the following is NOT a common habitat for gastropods?
- A) Marine
- B) Freshwater
- C) Terrestrial
- D) Aerial
Answer: D) Aerial
- Which of the following is a well-known marine gastropod?
- A) Clam
- B) Snail
- C) Squid
- D) Oysters
Answer: B) Snail
- Some gastropods, like cone snails, possess which type of specialized structure?
- A) Venomous radula
- B) Chromatophores
- C) Filter-feeding gills
- D) Foot
Answer: A) Venomous radula
- What is the primary mode of locomotion for gastropods?
- A) Jet propulsion
- B) Crawling using the foot
- C) Swimming
- D) Burrowing
Answer: B) Crawling using the foot
- Which of the following is a notable characteristic of the class Gastropoda?
- A) Segmentation
- B) A hard exoskeleton
- C) Spiral shell development
- D) Jointed appendages
Answer: C) Spiral shell development
- Which gastropod is known for its bright colors and toxicity?
- A) Slug
- B) Nudibranch
- C) Apple snail
- D) Garden snail
Answer: B) Nudibranch
- What is the primary reproductive strategy of most gastropods?
- A) Asexual reproduction
- B) Sexual reproduction
- C) Budding
- D) Fragmentation
Answer: B) Sexual reproduction
- The term “operculum” refers to:
- A) The gill structure
- B) A protective cover for the shell opening
- C) The feeding organ
- D) The eye stalks
Answer: B) A protective cover for the shell opening
- Which of the following adaptations helps aquatic gastropods breathe underwater?
- A) Gills
- B) Lungs
- C) Skin respiration
- D) Spiracles
Answer: A) Gills
- What is the primary diet of most gastropods?
- A) Detritus
- B) Algae and plant material
- C) Other mollusks
- D) Microorganisms
Answer: B) Algae and plant material
- The body of gastropods is divided into which three main parts?
- A) Head, foot, and shell
- B) Head, mantle, and foot
- C) Head, shell, and gills
- D) Foot, mantle, and digestive tract
Answer: B) Head, mantle, and foot
- Which of the following types of gastropods are known for their lack of a shell?
- A) Snails
- B) Slugs
- C) Conchs
- D) Scallops
Answer: B) Slugs
- The internal shell structure of a cuttlefish is known as:
- A) Cuttlebone
- B) Radula
- C) Operculum
- D) Mantle
Answer: A) Cuttlebone
- Which of the following is an adaptation for protection in many gastropods?
- A) Camouflage
- B) Shell
- C) Toxic secretions
- D) All of the above
Answer: D) All of the above
- What structure in gastropods is responsible for producing mucus to aid in movement?
- A) Mantle
- B) Foot
- C) Radula
- D) Gills
Answer: B) Foot
- Which of the following is a method by which some gastropods can escape predation?
- A) Fast swimming
- B) Burrowing
- C) Releasing toxins
- D) All of the above
Answer: C) Releasing toxins
- What feature is unique to the class Gastropoda compared to other mollusks?
- A) Possession of a shell
- B) Torsion
- C) Use of siphons
- D) Presence of gills
Answer: B) Torsion
- Which gastropod is known for its ability to survive in extreme environments, including intertidal zones?
- A) Sea slug
- B) Limpet
- C) Cowrie
- D) Conch
Answer: B) Limpet
- What is the primary predator of many gastropods?
- A) Fish
- B) Crustaceans
- C) Birds
- D) All of the above
Answer: D) All of the above
- The term “herbivorous” in the context of gastropods means they primarily feed on:
- A) Other animals
- B) Plants
- C) Fungi
- D) Detritus
Answer: B) Plants
- Gastropods are known to have what type of circulatory system?
- A) Open circulatory system
- B) Closed circulatory system
- C) No circulatory system
- D) Simple diffusion
Answer: A) Open circulatory system
- What type of gas exchange occurs in aquatic gastropods?
- A) Through skin
- B) Gills
- C) Lungs
- D) Siphons
Answer: B) Gills
- Which of the following adaptations allows some gastropods to thrive in dry environments?
- A) Ability to burrow
- B) Shell structure
- C) Mucus production
- D) All of the above
Answer: D) All of the above
- The eye structures of gastropods can vary significantly; some have:
- A) Compound eyes
- B) Simple eyes
- C) No eyes
- D) All of the above
Answer: D) All of the above
- The main purpose of the gastropod’s shell is to:
- A) Assist in locomotion
- B) Provide buoyancy
- C) Protect against predators and environmental hazards
- D) Aid in reproduction
Answer: C) Protect against predators and environmental hazards