Question | Answer |
Worms are divided into two types, ____________ and _____________. | flatworms and roundworms |
All worms are _____________ with three tissue layers. In addition, all worms have ____________ symmetry. | Invertebrates and Bilateral |
_____________ and _____________ are types of parasite flatworms. | tapeworms and flukes |
Parasites depend on a host organism to meed their needs. Planaraians however, are ______________________ flatworms. | free-living |
Roundworms were the first group of animals to evolve a digestive system with a ______________ and an ________. | Mouth and Anus |
Some like the ___________________ that attack dogs, are parasites. Most, however, are free-living. | heart worms |
Roundworms comprise a group of worms known as _________________. | nematodes |
How does a tapeworm eat? | Tapeworms attach themselves in a host's intestine and absorbe food the host has digested |
Describe the life cycle of a fluke. | The eggs are fertilized in the female, and she lays the fertilized eggs in a host. The egga leave in the host's waste and often infect snails anfter losing deposited in water. other hosts like humans, cn be infected while swimming. |
What is the most widespread human disease caused by flukes? | schistosomiasis |
List three ways roundworms are helpful to humans. | Roundworms help fight insects, may be used to kill ticks that cause Lyme disease, and help provide healthy soil. |