Unsegmented Worms Practice - Answers

University:
Winston-Salem Forsyth County Schools
Course:
AP Biology
Academic year:

2014
Views:

497

Pages:

2
Author:

Daggiantepjyb

KEY Name - _____________________ Unsegmented Worms Practice 1.) Name two types of unsegmented worms. ____ planarian and tapeworms____ 2.) To what phylum do the flatworms belong? ____ Platyhelminthes ____ 3.) Flatworms are soft, flattened worms that have tissues and internal ____organs___ 4.) A fluid filled body cavity that is lined with tissue is called a ____coelom___ 5.) What type of symmetry does a flatworm have? ___bilateral___ 6.) Flatworms rely on ___diffusion___ for respiration and excretion. 7.) The muscular tube near the mouth that aids in getting food is called the ____pharynx___ 8.) How do parasitic flatworms obtain their food? ____ingestion through their mouth ____ 9.) What type of flatworm has no digestive tract at all? _____tapeworm____ 10.) What do flame cells do? ____regulate water pressure internally____ 11.) What is ganglion? ___cluster of nerve cells or simple brain__. Do flatworms have ganglia? _yes_ 12.) What structure detects light in a flatworm? ____ocelli (eye spots)___ eyespots ocelli or mouth and anus pharynx 13.) Use the following diagram to help you label a flatworm. 14.) What is a hermaphrodite? ____organism with both male and female reproductive organs___ 1 KEY 15.) __Fission___is when an organism splits in two and each half grows to become a complete new organism. 16.) Turbellarians are ___planarian___ flatworms that live in marine and fresh water. 17.) Flukes are ___parasitic___ flatworms that infect internal organs of their host. 18.) How does a blood fluke infect a human? ___bore through the skin___ 19.) Blood fluke embryos develop inside what organism? ___snails___ 20.) Schistosomiasis is widespread in tropical areas that lack proper __sanitary__ treatment. 21.) Tapeworms are long, parasitic flatworms that are adapted to life inside the ___intestines___ of their hosts. Do tapeworms have a digestive tract? __no__ 22.) What is the head of the adult tapeworm called? ___scolex___ 23.) What are proglottids? ___sections of the tapeworm containing reproductive organs and eggs___ 24.) How are tapeworm zygotes passed out of the body? ___with feces___ 25.) The larvae of a tapeworm grow in the ___muscle tissue (as cysts)___ of the intermediate host. 2