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Biology Help Needed for Test Tomorrow!!!!?

These are my questions

Please give me the site where you find the information. Thanks, because I've been lookin for about an hour.

What are the six stages of porifera life cycle?

Describe the eyes of Playhelminthes.

Examples of platyhelminthes

How many times do nematodes molt during thier lifecycle?

What is the difference between a nematode and an annelid?

What are the 4 stages of the arthopod life cycle?

Are daddy long legs spiders?

Describe the body symmetry of echinoderms varies in each life cycle.

Do echinoderms exist in fresh water?

Thanks

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    ``````````````Describe the eyes of Playhelminthes.

    flat worms have very simple eye spot structures. They are simply detectors of light, the single is sent directly to their small nervous system.

    `````````````What are the 4 stages of the arthopod life cycle?

    1. egg

    2. larva

    3. pupa

    4. adult

    `````````````````Are daddy long legs spiders?

    No, daddy long legs (harvestmen) are eight-legged invertebrate animals.

    The difference between harvestmen and spiders is that in harvestmen the two main body sections are nearly joined, so that they appear to be one oval structure, the abdomen actually has 10 segments! Spiders' main body sections are not fused into one carapace.

    ``````````````Describe the body symmetry of echinoderms varies in each life cycle.

    Echinoderms' larvae are ciliated free-swimming organisms that organize in a bilaterally symmetric way.

    As they get older, the left side of the body grows at the expense of the right side, which is eventually absorbed, so there is no symmetry.

    At adulthood, the left side then grows in a pentaradially symmetric fashion, in which the body is arranged in five parts around a central axis.

    ``````````````Do echinoderms exist in fresh water?

    No.....Echinodermata is the largest animal phylum to lack any freshwater or terrestrial representatives.

    Source(s): my head hopefully this came to you in time.
  • 1 decade ago

    http://www.seawater.no/fauna/Pigghuder/index.htm

    in the first paragraph. Answer to:Do echinoderms exist in fresh water?

    http://cal.vet.upenn.edu/merial/Nematodes/nems_5.h...

    8th paragraph Answer to:How many times do nematodes molt during thier lifecycle?

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