write chracteristics of phylum ctenophora in points
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Explanation:
1.Also known as acnidarians due to absence of stinging cells .Also known as sea gooseberries, sea walnut and comb jellies
2.They have 8 rows of comb plates which they use for locomotion.
3.They reproduces only sexually.
4.Their symmetry is biradial.
5.Poedogenesis or neoteny that is reproduction through larva is seen here.
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Explanation:
Biradially symmetrical, with an oral - aboral body axis .
Eight rows of ciliated "combs" or ctenes , controlled by an apical sense organ at the aboral pole.
Incomplete gut (mouth but no anus ).
No excretory, respiratory, or circulatory systems.
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