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Ten Phyla Parasitism Essay

Phyla and Parasites Ten Phyla:

Phylum Mollusca ~ Living Species Number: World: at least 50,000; United States:

Approximately 20,000; Texas: More than 2,000; Number of Fossil Forms: 150,000

Phylum Brachiopoda ~ Living Species Number: World: 400; United States: 80; Texas: 10;

Number of Fossil Forms: 5,000

Phylum Echinodermata ~ Living Species Number: World: 7,000; United States: Approximately

2,000; Texas: Approximately 200; Number of Fossil Forms: 13,000

Phylum Chordata ~ Living Species Number: World: More than 60,000; United States: 20,000

Texas: Approximately 2,000; Number of Fossil Forms: 114,000

Phylum Conulariida ~ Living Species Number: World: Approximately150; United States: Less

than 50; Texas: Unknown but less than 10; Number of Fossil Forms: More than 250,000

Phylum Cnidaria ~ Living Species Number: World: More than 10,000; United States: 4,000; Texas: More than 50; Number of Fossil Forms: Approximately 25,000 species

Also, they have no digestive tract which allows them to absorb food directly from the stomach.
Ascaris ~ Adapted…

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