Question

1. use the venn diagram to compare planarians to tapeworms. list facts that describe planarians in the left oval. list facts that describe tapeworms in the right oval. list facts that describe both planarians and tapeworms where the ovals overlap.

venn diagram with two ovals labeled planaria (top) and tapeworm (bottom), and an overlapping section labeled both

Explanation:

• Planaria (Left Oval): Free - living flatworms, have a simple brain (ganglion), can regenerate lost body parts, live in freshwater environments, have a ciliated epidermis for movement.
• Tapeworm (Right Oval): Parasitic flatworms, lack a digestive system (absorb nutrients from host), have a scolex for attachment to host, have proglottids (body segments) that contain reproductive organs, live in the intestines of vertebrate hosts.
• Both (Overlap): Belong to the phylum Platyhelminthes (flatworms), have bilateral symmetry, are acoelomates (no body cavity), have a flattened body shape, have a simple nervous system, are hermaphroditic (have both male and female reproductive organs).

Answer:

• Planaria: Free - living, can regenerate, freshwater, ciliated movement, ganglion - based brain.
• Tapeworm: Parasitic, no digestive system, scolex, proglottids, intestinal parasite.
• Both: Platyhelminthes, bilateral symmetry, acoelomate, flattened body, simple nervous system, hermaphroditic.