Invertebrates
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What can be classifies into different groups?
Invertebrates
What are the different groups of invertebrates?
Poriferans, Cnidarians, Worms, Mollusks, Echinoderms, & Arthropods
What are the simplest invertebrates?
Poriferans or Sponges
These invertebrates belong phylum Porifera. What are these?
Poriferans
What does the word porifera mean?
“pore-bearing”
What is covered with many pores for tiny openings?
Sponge
What are some of the most unusual living thing found on Earth?
Sponges
What are invertebrates animals that usually have no body symmetry and never have tissues of organs?
Sponges
What is the thin, spiny structure that form the skeleton of many sponges?
Spicules
What is composed of many invertebrate animals with brilliant colors and strange shapes?
Cnidarian
What are examples of this phylum?
Jellyfishes, Corals, Hydras, and Sea anemones
These have two basic forms. What are these?
Vase-shaped polyp and Bow-shaped Medusa
What name comes from a Greek word meaning “to sting’?
Cnidaria
What has a hollow central cavity with only one opening called “mouth”?
Cnidaria
What is the special stinging structures that all cnidarians have?
Nematocyst
These are used to stun or kill prey. What is this?
Nematocyst
What are soft-bodied organisms?
Coral
What do they build using minerals in the water?
Hard and protective cover of limestone
What is an underwater ecosystem in which diverse kinds of organisms live?
Reef
What are the most common cnidarians?
Jellyfishes
What can deliver a painful poison through their nematocysts located on their tentacles?
Jellyfishes
What cnidarians use these stinging structures to catch their prey?
Jellyfishes
What are cnidarians that spend their lives as polyps?
Hydras
They live in freshwater. What are these?
Hydras