zoology: animal diversity Flashcards
Do sponges (Porifera) have tissues?
: No, they have specialized cells but lack true tissues.
What kind of symmetry do sponges have?
Sponges (Porifera) are asymmetrical.
What is unique about the feeding process of sponges?
Sponges use collar cells to create water currents and filter-feed.
Are sponges mobile or sessile?
Sponges are sessile, meaning they are attached to a substrate.
What are examples of animals in the phylum Cnidaria?
Jellyfish, corals, sea anemones, and blue bottles
How many tissue layers do Cnidaria have?
They are diploblastic, meaning they have two tissue layers.
What type of symmetry do Cnidaria have?
Radial symmetry.
What are nematocysts, and which phylum has them?
Nematocysts are stinging cells used by Cnidaria for catching prey.
Describe the body forms of Cnidaria.
Cnidaria can exist as sessile polyps (mouth facing up) or free-swimming medusae (mouth facing down).
What animals are included in the phylum Platyhelminthes?
Flatworms like Planaria, flukes, and tapeworms.
How many tissue layers do Platyhelminthes have?
They are triploblastic, with three tissue layers.
Do Platyhelminthes have a coelom?
No, they are acoelomate (lack a coelom).
What kind of gut do Platyhelminthes have?
They have a single gut opening (no through-gut).
What is an example of an animal in the phylum Annelida?
Earthworms, polychaetes, and leeches.
What kind of symmetry and gut structure do Annelida have?
They are bilaterally symmetrical and have a through-gut (both mouth and anus).
