Unit 6 Flatworms and Roundworms

What phylum are the flat worms under?

• Annelid

• Platyhelminthes

• Rotifers

• Sipuncula

How do flatworms reproduce?

• Sexually and asexually

• asexually

• sexually

A tapeworm lives inside of a host's body. This means that tapeworms are _______________. 

• Ectoparasites
• Endoparasites
• Free-living
• Flukes

Flatworms have no true body cavity. This means they are ____________________. 

• Symmetrical
• Sessile
• Coelomates
• Acoelomates

What is a definitive host? 

• An organism that any parasite can live on.
• The last organism that a parasite uses to live.
• The organism that parasitic eggs are laid on. 
• An organism that parasites find easily. 

The small segments behind a scolex that reproduce quickly, making a tapeworm longer and longer are called...

• Cilia
• Hooks
• Proglottids
• Snaps

What is cephalization? 

• Having male and female parts.
• A concentration of sense organs and nervous system at the anterior end of the body. 
• Feeding off of another organism.
• Breathing through the skin.

Which type of roundworm is the most life-threatening canine worm?

• Heartworm
• Pinworm
• Hookworm
• Liverworm

Of the following options, where would you most expect to find an ectoparasite?

• In the blood.
• In your liver.
• Inside an elephant.
• On the outside of a fish.

Why is it so important that Platyhelminthes worms have a flattened body?

• So they can fit in small spaces.
• It's easier for them to move that way. 
• Their cells absorb oxygen through their skin, so they have to be close to the outside. 
• It makes reproduction more simple.