Cnidarians are widespread in marine habitats,but there are a few freshwater forms.
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Q12: Most of the hydrozoans are colonial marine
Q13: The radiate animals represent the tissue-organ level
Q14: The class of cnidarians with the most
Q15: The anthozoans include the marine sea anemones
Q16: A common characteristic of cnidarians is
A)an osculum.
B)dimorphism
Q18: The most typical habitat of cnidarians is
Q19: Ctenophores,also known as sea wasps,are responsible for
Q20: Some fish eat cnidarians,and then use the
Q21: The nematocyst is enclosed within the cell
Q22: The morphological type adapted to a sedentary
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