Test 3 From Practice Tests Flashcards
The phylum ___ live in water, are sessile, and have choanocytes.
Porifera
All animals are multicellular and ___.
Heterotrophic
Cnidarians occur in two basic body forms: polyp and ___.
Medusa
Stationary mobilia have feeding polyps and ___ polyps.
Reproductive
The gastrovascular cavity of a Hydra has how many openings?
One
Unique to Cnidaria are specialized stinging cells called ___.
Nematocysts
Flatworms belong to what phylum?
Platyhelminthes
Planaria is ___, which means they possess both male and female sex organs.
Hermaphroditic
What organ of the planaria reminded early investigators or a flickering candle?
Flame cells
Tapeworms have a hook and sucker structure called a __.
Scolex
___ are animals that have a body cavity completely lined with mesoderm.
Celomates
Loligo belongs to which phylum?
Mollusca
How many parts does the squid have?
Three
Is the circulatory system of the squid open or closed?
Closed
When observing the external anatomy of the earthworm, the enlarged section is called a ___.
Clitellum