- Platyhelminthes are commonly known as:
- A) Roundworms
- B) Flatworms
- C) Segmented worms
- D) Marine worms
Answer: B) Flatworms
- Which of the following is a characteristic feature of Platyhelminthes?
- A) Body segmentation
- B) Coelom presence
- C) Bilateral symmetry
- D) Exoskeleton
Answer: C) Bilateral symmetry
- Platyhelminthes are classified under which of the following phyla?
- A) Annelida
- B) Nematoda
- C) Cnidaria
- D) Platyhelminthes
Answer: D) Platyhelminthes
- Which class of Platyhelminthes includes parasitic species?
- A) Turbellaria
- B) Monogenea
- C) Trematoda
- D) Cestoda
Answer: C) Trematoda
- The body of Platyhelminthes is primarily composed of:
- A) Endoderm and ectoderm
- B) Mesoderm and ectoderm
- C) Mesoderm, ectoderm, and endoderm
- D) Ectoderm only
Answer: C) Mesoderm, ectoderm, and endoderm
- The primary habitat of most Platyhelminthes is:
- A) Terrestrial
- B) Freshwater
- C) Marine
- D) All of the above
Answer: D) All of the above
- Which of the following classes includes tapeworms?
- A) Turbellaria
- B) Trematoda
- C) Cestoda
- D) Monogenea
Answer: C) Cestoda
- Platyhelminthes lack which of the following systems?
- A) Circulatory system
- B) Digestive system
- C) Nervous system
- D) Reproductive system
Answer: A) Circulatory system
- The structure used by many Platyhelminthes for locomotion is called:
- A) Cilia
- B) Muscles
- C) Tentacles
- D) Pseudopodia
Answer: A) Cilia
- Which of the following is an example of a free-living Platyhelminth?
- A) Schistosoma
- B) Taenia
- C) Planaria
- D) Fasciola
Answer: C) Planaria
- The excretory system of Platyhelminthes primarily functions through:
- A) Kidneys
- B) Flame cells
- C) Gills
- D) Lungs
Answer: B) Flame cells
- Platyhelminthes typically reproduce by:
- A) Asexual budding
- B) Sexual reproduction
- C) Binary fission
- D) All of the above
Answer: D) All of the above
- The head region of Platyhelminthes is known as the:
- A) Cephalothorax
- B) Auricle
- C) Planaria
- D) Proglottid
Answer: B) Auricle
- What type of digestive system do Platyhelminthes possess?
- A) Complete digestive system
- B) Gastrovascular cavity
- C) No digestive system
- D) Alimentary canal
Answer: B) Gastrovascular cavity
- The term “dorsal-ventral flattening” refers to which aspect of Platyhelminthes?
- A) Their body shape
- B) Their reproductive system
- C) Their feeding habits
- D) Their habitat
Answer: A) Their body shape
- In Platyhelminthes, which structure is responsible for the absorption of nutrients?
- A) Proglottids
- B) Microvilli
- C) Flame cells
- D) Setae
Answer: B) Microvilli
- Which of the following diseases is caused by a trematode?
- A) Cysticercosis
- B) Schistosomiasis
- C) Tapeworm infection
- D) Liver fluke disease
Answer: B) Schistosomiasis
- The larval stage of some Platyhelminthes is known as:
- A) Miracidium
- B) Cercaria
- C) Metacercaria
- D) All of the above
Answer: D) All of the above
- Which of the following is a characteristic of Cestoda?
- A) They have a well-developed digestive system.
- B) They possess hooks and suckers.
- C) They are primarily free-living.
- D) They have cilia on their body surface.
Answer: B) They possess hooks and suckers.
- Platyhelminthes are considered to be:
- A) Coelomates
- B) Acoelomates
- C) Pseudocoelomates
- D) Eucoelomates
Answer: B) Acoelomates
- Which of the following is NOT a function of the nervous system in Platyhelminthes?
- A) Movement coordination
- B) Sensory reception
- C) Excretion
- D) Response to stimuli
Answer: C) Excretion
- The life cycle of many Platyhelminthes involves:
- A) Single host
- B) Multiple hosts
- C) No hosts
- D) Terrestrial life
Answer: B) Multiple hosts
- The scolex is a structure found in:
- A) Turbellaria
- B) Trematoda
- C) Cestoda
- D) Monogenea
Answer: C) Cestoda
- Which of the following organs are absent in Platyhelminthes?
- A) Eyes
- B) Gills
- C) Mouth
- D) Tentacles
Answer: B) Gills
- The main function of the tegument in parasitic Platyhelminthes is:
- A) Protection from the host’s immune system
- B) Digestion of food
- C) Locomotion
- D) Respiration
Answer: A) Protection from the host’s immune system
- Platyhelminthes exhibit which type of symmetry?
- A) Radial symmetry
- B) Bilateral symmetry
- C) Asymmetry
- D) No symmetry
Answer: B) Bilateral symmetry
- What type of body cavity do Platyhelminthes possess?
- A) Coelom
- B) Pseudocoel
- C) No true body cavity
- D) Hemocoel
Answer: C) No true body cavity
- Which Platyhelminthes class includes fish ectoparasites?
- A) Trematoda
- B) Cestoda
- C) Monogenea
- D) Turbellaria
Answer: C) Monogenea
- The body structure of a typical Platyhelminth is:
- A) Cylindrical and segmented
- B) Flattened and elongated
- C) Cubical
- D) Spherical
Answer: B) Flattened and elongated
- Which of the following methods do Platyhelminthes primarily use for locomotion?
- A) Jet propulsion
- B) Ciliary movement
- C) Swimming with fins
- D) Crawling with appendages
Answer: B) Ciliary movement