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The Phylum Nemertea (ribbon worms) is also referred to as the Phylum ___________ (proboscis worms, from the Greek word for “snout cavity). |
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2 | |
The nemertines or nemerteans are named from the Greek word, “nemertes”, which means “___________________.” |
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3 | |
The defining characteristic of the phylum is the presence of __________________. |
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4 | |
Are most nemerteans marine, freshwater, or terrestrial? |
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5 | |
How are nemerteans similar to turbellarian flatworms? |
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6 | |
How are they different from turbellarian flatworms? (In what ways are they unique and therefore placed into a separate phylum?) |
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7 | |
What is the evidence that nemerteans are more closely related to certain coelomates than to any flatworms? |
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8 | |
Unlike flatworms, nemerteans have a ___________ circulatory system, in which the blood circulates through contractile vessels, which may be modified _____________. |
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9 | |
Unlike flatworms, nemerteans have a _______________ digestive tract, with a mouth and an anus. |
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10 | |
Unlike flatworms, nemerteans have a hollow, muscular ________________, which is distinct from the digestive tract, in a separate, fluid-filled space called a _________________. Why is the rhynchocoel considered a coelomic cavity? |
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11 | |
What are the 2 major classes? |
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12 | |
Describe reproduction in nemerteans. What is the name of the distinctive type of larva produced by the Heteronemertea? |
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