Phylum Platyhelminthes: Flatworms Overview
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Questions and Answers

What is the primary mode of locomotion for most turbellarians?

  • Hopping or jumping using specialized appendages
  • Crawling using muscular contractions
  • Swimming using undulating body movements
  • Gliding across surfaces using a ciliated epidermis (correct)

What is the function of rhabdites in turbellarians?

  • To aid in digestion of food
  • To secrete enzymes for predation
  • To produce a protective mucous sheath around the body (correct)
  • To facilitate gas exchange

Which class of flatworms includes the free-living and some symbiotic and parasitic forms?

  • Cestoda
  • Turbellaria (correct)
  • Trematoda
  • Monogenea

What is the primary habitat for freshwater planarians?

<p>Both a and b (A)</p> Signup and view all the answers

Which class of flatworms is primarily composed of ectoparasites?

<p>Monogenea (D)</p> Signup and view all the answers

What is the primary function of dual-gland adhesive organs in the epidermis of turbellarians?

<p>To allow them to attach and detach from surfaces quickly (A)</p> Signup and view all the answers

What is the function of the tegument in parasitic flatworms?

<p>It helps the flatworm avoid the host's immune system and resist digestive juices. (A)</p> Signup and view all the answers

Which of the following statements about planarians is true?

<p>They detect food using chemoreceptors and entangle prey in mucous secretions. (C)</p> Signup and view all the answers

What is the significance of the syncytial nature of the tegument in parasitic flatworms?

<p>It may render the tegument more resistant due to the lack of cell junctions. (A)</p> Signup and view all the answers

Which of the following statements about the planarian digestive system is incorrect?

<p>The intestine has a single, unbranched trunk. (D)</p> Signup and view all the answers

How do planarians feed on their prey?

<p>They grip the prey with their anterior end, wrap around it, extend the pharynx, and suck up food in small amounts. (A)</p> Signup and view all the answers

What is the primary function of the tegument in tapeworms?

<p>It absorbs nutrients from the host's digestive cavity. (B)</p> Signup and view all the answers

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