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halle Hudson

Blume Ch 12.2

Sponges have little in common with other animals- probably _____ separately from all other animals. evolved
Most sponges are asymmetrical and ________ sessile
A sponge body is hollow ______ with one opening at the top and many small pores along the body tube tube
Sponges have no tissues, organs, or organ systems; they often do have _______ spicules
________ for protection and support spongin
Sponges pull microscopic food particles and oxygen in through their _______; wastes are removed through the opening at the top of the sponge. pores
Most sponges are________ that produce both sperms and eggs, though sponges cannot fertilize their own eggs; sponges can also reproduce asexually by budding or regeneration hermaphrodites
________ are invertebrates that include corals, sea anemones, jellyfish, hydras, and Portuguese man-of-wars cnidarians
Most cnidarians live in _____ water; some live as individuals. while others live in colonies salt
Most cnidarians have two body _____ forms
They polyp is _______ - shaped and sessile vase
the _______ is bell-shaped and free-swimming medusa
Cnidarians have one body opening and _____ symmetry radical
two cell layers are arranged into _______; a digestive cavity breaks down food tissues
a ________ net carries impulses and connects all organism parts nerve
most cnidarians have ______ with stinging cells to help capture food tentacles
Cnidarians are __________ predators
Cnidarians ________ both sexually and asexually reproduce
Cnidarians have existed more than 6000 million years; mors of their fossils are_________ corals
Coral reefs form as corals secrete their hard external _______ on those of earlier generations skeletons
Coral reefs are _________ecosystems that protect shorelines from erosion diverse
Coral reefs provide ___________ such as shells, pearls, and chemicals from human medical uses recourses
Created by: Hhudson:)