PLZZ ANSWER FAST ITZ URGENT I M GIVING U 50 POINTS!!!STATE THE CLASSES OF CNIDARIANS AND SIMPLE DIFFERENCES BETWEEN THEM,? NEED A SMALL ANSWER PLZZ
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There are three classes in coelenterates or cnidarians .These are:
1)HYDROZOA :Their life history includes both polypoid and medusoid form. ex: hydra, obelia, physalia, porpita etc.
2)SCYPHOZOA:Their life history has only medusoid form.ex:aurelia, rhizostoma etc.
3)ANTHOZOA: Their life history has only polypoid form. ex: pennatula, tubipora, gorgonia, metridium, fungia etc.
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POLYPS: These are diploid, cylindrical and sedantry and either solitary or colonial and reproduces asexually.(polypoid form)
MEDUSAE: These are diploid, umbrella like , free swimming sexual phase.
NOTE: The two upper given terms are divisions of cnidarians on the basis of body shape and reproduction......
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1)HYDROZOA :Their life history includes both polypoid and medusoid form. ex: hydra, obelia, physalia, porpita etc.
2)SCYPHOZOA:Their life history has only medusoid form.ex:aurelia, rhizostoma etc.
3)ANTHOZOA: Their life history has only polypoid form. ex: pennatula, tubipora, gorgonia, metridium, fungia etc.
_______________________ _____________
POLYPS: These are diploid, cylindrical and sedantry and either solitary or colonial and reproduces asexually.(polypoid form)
MEDUSAE: These are diploid, umbrella like , free swimming sexual phase.
NOTE: The two upper given terms are divisions of cnidarians on the basis of body shape and reproduction......
HOPE THIS HELPED U
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hey
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the 4 classes of cnidrarians are):- hydrozoa, cubozoa,scyphozoa and anthozoa...
Corals, sea anemones and jellyfish are the most familiar of the cnidarians. Two lesser-known groups are tiny moss-like creatures called hydroids...
differences are):-
• ANTHOZOA is a class within the phylum Cnidaria that contains the sea anemones and corals.
• Hydrozoa have a variety of life cycles. Some have no polyp stages and some (e.g. Hydra) have no medusae.
• Scyphozoans have separate sexes and form planula larvae through external fertilization.
• Cubozoans have medusae commonly known as box jellyfish, from their shape.
××××
the 4 classes of cnidrarians are):- hydrozoa, cubozoa,scyphozoa and anthozoa...
Corals, sea anemones and jellyfish are the most familiar of the cnidarians. Two lesser-known groups are tiny moss-like creatures called hydroids...
differences are):-
• ANTHOZOA is a class within the phylum Cnidaria that contains the sea anemones and corals.
• Hydrozoa have a variety of life cycles. Some have no polyp stages and some (e.g. Hydra) have no medusae.
• Scyphozoans have separate sexes and form planula larvae through external fertilization.
• Cubozoans have medusae commonly known as box jellyfish, from their shape.
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