Platyhelminthes

This class of Phylum Platyhelminthes are parasites of vertebrates, with two suckers to attach to the host; includes flukes and trematodes

• Turellaria
• Monogenea
• Trematoda
• Cestoda

This class of Platyhelmithes are parasites of vertebrates; attach to the host with a scolex; includes tapeworms.

• Turbellaria
• Monogenea
• Trematoda
• Cestoda

Why are scientists studying the flatworms, planarians?

• Insights into regeneration and stem cells.
• Insights into nutritional uses of algae.
• Insights into negative photoreceptors
• Insights into parasite life cycles 

How is the reproduction of free-living flatworms described?

• sex
• penis fencing between two flatworms of the opposite sex
• penis fencing between two flatworms of the same sex
• penis fencing between two flatworms that are hermaphrodites

When flatworms perform penis fencing, what is the advantage of 'winning' or providing the sperm

• The female now has a disadvantage of needing extra nutrients for eggs, while the male gets to swim away and only care for himself
• The female has no disadvantage
• There is no advantage to providing the sperm
• The female carries the eggs and this is not a disadvantage

How do flatworms obtain food?

• They have one opening serving as a mouth and an anus
• They have a mouth separate from its anus
• They obtain nutrition by absorbing through the environment
• They have several openings to their gastrovascular cavity

What clade of animals are flatworms found?

• radiolarian
• bilateria
• cnidarians
• pseudocoelomata

Flat worms can reproduce 

• sexually 
• asexually
• both sexually and asexually

Tags

NGSS.MS-LS3-2

Planaria are members of class

• Platyhelminthes
• Cestoidea
• Turbellaria
• Trematoda

What is the function of the scolex of a tapeworm?

• To attach to the intestinal wall of the host 
• To reproduce
• To get rid of waste
• To carry the eggs