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30 Cards in this Set
- Front
- Back
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When do cnidaria move?
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in the medusa stage
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How do cnidaria in the polyp stage move?
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They don't, derrrrrrr.
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cnidarians swim by contracting their ___________
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bell
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how does contracting the bell work for cnidarians?
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it expels water from the concave side
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Cnidarians are what kind of muscular?
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epitheliomuscular
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what does epitheliomuscular mean?
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Controlled by a nerve net
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what kind of skeleton do cnidaria have?
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hydrostatic skeleton, which provides structure and resistance for the above muscle cells
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how do cnidaria respire?
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diffusion
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how do cnidaria sense light?
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ocelli (simple eye)
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Where is the nerve net located?
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in the epithelium
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what kind of nervous system is the nerve net?
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diffuse-style
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a fluid-filled cellular cyst, a __________, helps to sense direction
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statocyst
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most cnidarians capture prey using ________ and _________ .
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tentacles, cnidocytes
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how are cnidocytes triggered?
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by touching the cnidocil
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where are the cnidocytes located?
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connected to the nerve net
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what is the gut of the cnidarian called?
And what kind of gut is this? |
gastrovascular cavity, an incomplete gut
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what kind of digestion occurs in the gastrovascular cavity?
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extracellular
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what kind of digestion occurs in the gastrodermal cells?
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intracellular
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who does coral have a symbiotic relationship with?
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photosynthesizing algae that help to obtain additional energy
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how do cnidaria excrete?
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diffusion
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cnidaria have how many reproductive cycles?
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Two: polyp form and medusa form
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how do scyphozoa spend most of their time?
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in the medusa stage
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scyphozoa are __________, meaning they have male and female individuals
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dioecious
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what kind of fertilization do scyphozoa have?
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internal
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for scyphozoa, what forms a polyp?
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planula larvae
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what kind of reproduction does a polyp go through?
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asexual rerpoduction, and produces mature, free-swimming jellyfish
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how do hydrozoa spend most of their time?
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in the polyp stage
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hydrozoa reproduce __________ through __________ .
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asexually, budding
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hydrozoa reproduce __________ when budding results in __________ . Which release eggs and sperm that develop into __________.
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sexual, medusae.
Planula larvae |
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how do anthozoa spend all of their time?
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in the polyp stage
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