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alli 4dyce

Blume Ch 12.2

Sponges have little in common with other animals – probably _____ separately from all other animals. evolved
Most sponges are symmetrical and _______ sessile.
A sponge body is a hollow _____ with one opening at the top & many small pores along the body tube tube
Sponges have no tissue, organs, or organ systems; they often do have ______ or ______ for protection & support. spicules or spongin
Sponges pull microscopic food particles & oxygen in through their _____; wastes are removed through the opening at the top of the sponge. pores
Most sponges are ______ that produce both sperm & 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, jelly fish, hydras, & Portugese man-of-wars. cnidarians
Most cnidarians live in _____ water; some live as individuals, while others live in colonies. salt
Most cnidarians have two body _____ form
The polyp is ______-shaped & sessile vase
The ______ is bell-shaped & free-swimming medusa
Cnidarians have one body opening & ______ 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 ______. predators
Cnidarians _________ both sexually & asexually. produce
Cnidarians have existed more than 600 million years; most of their fossils are ______. corals
Coral reefs form as corals secrete their hard external ______ on those of earlier generations. skeletons
Coral reefs provide _______ such as shells, pearls, & chemicals for humans. resources
Created by: afordyce