Term
| Characteristics of Pseudocoelomates |
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Definition
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Triploblastic, bilateral symmetry, unsegmented
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Body cavity a pseudocoel (a persistent blastocoel)
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generally only longitudinal muscles
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Complete gut with anus
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No circulatory or respiratory systems
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Sexes usually separate; males often have copulatory parts
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Development varies from direct to complex life cycles
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Often have cell numbers constant (eutely)
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Term
| What is a pseudocoel? How is it formed during development? |
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Definition
| Pseudocoel is fluid filled gut. Formed when mesoderm lines, but does not completely fill, blastocoel. |
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Term
| Characteristics of Phylum Nematoda |
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Definition
1. Pseudocoelomates
2. Triploblastic
3. Has a complete digestive tract. |
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Term
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Definition
Horsehair worms
Typically parasitize (and take control of) insects. |
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Term
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Definition
| Has a crown of cilia around the mouth. Beating looks like wheels. |
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Term
| parthenogenetic & sexual (i.e., mictic & amictic) cycles in rotifers |
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Definition
Some are only females and reproduce via parthenogenesis (fertilizing their own eggs)
Some can create eggs and fertilize via parthenogenesis to make females and degenerate males (cannot even feed themselves). |
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Term
| Phylum Acanthocephala. What structure do males have that they can use against other males? Why does this occur? |
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Definition
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