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Clay Skiles

Blume Chapter 12.2

Sponges have little in common with other animals- they probably____________ separately from all other animals. evolved
Most sponges are asymmetrical and ____________. sessile
A sponge body is a 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 _____________ or ____________ for protection and support. spicules; 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 sperm and eggs, though sponges cannot fertilize their own eggs; sponges can also produce asexually by budding or regeneration. hermaphrodites
__________________ are invertebrates that include corals, sea anemones, jellyfish, hydras, and Portuguese man-o-wars. Cnidarians
Most cnidarians live in ________ water, some live as individuals, while others live in colonies. salt
Most cnidarians have two body ________. forms
The polyp is _______-shaped and sessile. vase
The __________ is bell-shaped and free-swimming. medusa
Cnidarians have one body opening and ___________ symmetry. radial
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 ______________. (These types of creatures destroy and devour their food) predators
Cnidarinans ______________ both sexually and asexually reproduce
Cnidarians have existed more than 600 millions years; most 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 for human medical uses. resources
Created by: cskiles