Question: 1.Which of the following structures are part of the nervous
system of nonvertebrate chordates?
di…
1.Which of the following structures are part of the nervous
system of nonvertebrate chordates?
diffuse and noncentralized
eye or ocelli
nerve cord
central ganglion
brain
2.
How would you describe the digestive system of lancelets?
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U shaped system with siphons for intake and excretion, and a |
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diffusion of nutrients through the skin |
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simple tube from pharynx to anus |
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well developed digestive system that includes a mouth, crop, |
3.
How do lancelets eliminate nitrogenous wastes?
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malpighian tubules |
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excurrent siphon |
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diffusion through skin |
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paired nephridia |
4.
By what mechanism do lancelets complete gas exchange?
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book lungs |
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diffusion through tube feet |
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a series of gas siphons |
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diffusion through skin |
5.
Which of the following structures are part of the digestive
systems of echinoderms? Check all that apply.
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pharynx |
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stomach |
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intestine |
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crop |
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mouth |
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gizzard |
6.
How would you describe the support structure of tunicates?
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endoskeleton of silica |
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exoskeleton |
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hydrostatic skeleton |
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endoskeleton of calcium carbonate |
