Invertebrates 1: Sponges, Cnidarians, Flatworms

Which of the following is NOT a characteristic of sponges?

• Body wall penetrated by many pores

• Cells organized into tissues

• Collar cells trap food particles

• Amoebocytes pick up nutrients

In which way are corals different from most other cnidarians?

• They exist only in the medusa form

• They secrete a tough outer skeleton

• They reproduce only asexually

• They are photosynthetic

Anthozoans make up

• Single-cell organisms

• Algae

• Coral reefs

• Planula form

Which of the following is the sequence of structure in the life cycle of a fluke?

• Larva, egg, intermediate host, final host

• Egg, larva, intermediate host, final host

• Final host, intermediate host, larva, egg

• Egg, larva, final host, intermediate host

What is a tegument?

• A body cavity in flatworms

• Another name for fragmentation

• Free-living medusa

• Covering, which prevents from being digested

Identify

• Scyphozoan

• Anthozoan

• Hydrozoan

What is a planula?

• Egg stage in Sponges

• Larval stage in Sponges

• Egg stage of Cnidarians

• Larval stage of Cnidarians

Cnidarians have two life forms -> medusa and

What is one function of choanocytes in a sponge?

• Supporting the body

• Fertilizing eggs

• Distributing nutrients

• Moving water

Free living flatworms are

• carnivores

• herbivores

• omnivores

• detritivores