porifera
What type of symmetry do organisms in Phylum Porifera exhibit?
Asymmetry
What is the name of the stinging cells found in Phylum Cnidaria?
Cnidocytes
What is the common name for organisms in Phylum Platyhelminths?
Flatworms
What is a characteristic feature of organisms in Phylum Nematoda?
They have a cylindrical, unsegmented body
Which phylum is known for its porous body structure?
Porifera
What is the primary characteristic of the body structure of organisms in Phylum Porifera?
They have a porous body with a skeleton made of spicules or spongin.
What type of body symmetry do organisms in Phylum Cnidaria display?
Radial symmetry
Do flatworms have a digestive system?
Yes, but they have a single opening used for both ingestion and excretion.
What is the common name for organisms in Phylum Nematoda?
Roundworms
Which phylum is characterized by having cnidocytes (stinging cells)?
Cnidaria
What type of cells are responsible for moving water through a sponge?
Choanocytes
What are the two main body forms of cnidarians?
Polyp and Medusa
What type of symmetry do flatworms exhibit?
Bilateral symmetry
Are roundworms typically free-living or parasitic?
Both many species are free-living, but many are parasitic.
Which phylum is primarily composed of parasitic species with bilateral symmetry?
Platyhelminths
How do sponges obtain food?
They filter food particles from water.
Which famous organism is a member of Phylum Cnidaria?
Jellyfish
What is the name of the parasitic flatworm that infects humans?
Tapeworm
Which disease is caused by roundworms in humans?
Hookworm infection
What characteristic do all the mentioned phyla (Porifera, Cnidaria, Platyhelminths, Nematoda) share?
They are all invertebrates.
Which is the largest class within Phylum Porifera?
Demospongiae
What is the function of the nematocyst in cnidarians?
It is used for capturing prey and defense by delivering toxins.
How do flatworms typically reproduce?
They can reproduce both sexually (hermaphroditic) and asexually (fission
How do roundworms reproduce?
They reproduce sexually, with distinct male and female individuals.
Which of the phyla discussed is most complex in terms of body systems?
Nematoda (Roundworms)