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Campbell Biology Chapter 33 Study Guide with Complete Solutions

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Campbell Biology Chapter 33 Study Guide with Complete Solutions Invertebrates - Answer️️ -Animals without a backbone. About 95% of known animal species. Calcarea and Silicea - Answer️️ -phylum that includes sponges; no symmetry, tissues, body cavity, organs, nervous system; basal anima...

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  • September 13, 2024
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  • 2024/2025
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Campbell Biology Chapter 33 Study
Guide with Complete Solutions


Invertebrates - Answer✔️✔️-Animals without a backbone. About 95% of known animal

species.


Calcarea and Silicea - Answer✔️✔️-phylum that includes sponges; no symmetry, tissues,

body cavity, organs, nervous system; basal animals; mostly marine; contain spicules;

most are hermaphrodites; free-swimming during larval stage and sessile (non motile) as

adults; suspension/filter feeders

Suspention feeders - Answer✔️✔️-small and large organisms that use filtering and

trapping techniques to collect minute food particles suspended in the water

Spongocoel - Answer✔️✔️-large central cavity of the sponge

Osculum - Answer✔️✔️-A large opening on a sponge through which filtered water is

expelled

Choanocytes - Answer✔️✔️-specialized cell in sponges that uses a flagellum to move a

steady current of water through the sponge

mesohyl - Answer✔️✔️-a gelatinous region between the two layers of cells of a sponge

amoebocytes - Answer✔️✔️-the "do-all" cells of sponges, moving by means of

pseudopodia, they digest and distribute food, transport oxygen, and disposes of waste.

they manufacture the fibers that make up a sponges skeleton



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