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can be any phylum

2006-10-19 10:10:05 · 6 answers · asked by Ellen H 1 in Science & Mathematics Zoology

6 answers

A lot of the animal phyla have quite a lot of diversity in them, it might be hard to do any more than a really quick overview of one of the biggies like Arthropoda, Chordata, or Mollusca.

I'd suggest something a little more manageable, yet cool.

Onychophorans, or velvet worms, look kind of like a cross between an earthworm and a centipede. Today they are the only phylum that is completely terrestrial (although there were fossil forms that lived in the sea).

They are predators that capture prey by squirting entangling fluid (like Spidey's web-shooters), and to reproduce the males simply stick a packet of sperm somewhere on the female's body (they don't really care where). The sperm gets absorbed into the female's body, and passed to the ovaries.

Weird, interesting, and there's only about 100 living species, so they're not so diverse as to make the project too daunting.

Here's the wikipedia page about them http://en.wikipedia.org/wiki/Onychophora

2006-10-19 12:16:29 · answer #1 · answered by Anonymous · 0 0

Phylum (plural: phyla) is a taxon used in the scientific classification of life. "Phyla" is adopted from the Greek phylai, the clan-based voting groups in Greek city-states. Phyla represent the largest generally accepted groupings of animals and other living things with certain evolutionary traits, although the phyla themselves may sometimes be grouped into superphyla (e.g. Ecdysozoa with eight phyla, including arthropods and roundworms; and Deuterostomia with the echinoderms, chordates, hemichordates and arrow worms). Informally, phyla can be thought of as grouping animals based on general body plan[1], e.g., having bones vs. having an exoskeleton. This is morphological grouping. But despite the seemingly different external appearances of organisms, they are classified into phyla based on their internal organizations[2]. For example, though seemingly divergent, spiders and crabs both belong to Arthropoda, whereas earthworms and tapeworms, similar in shape, are from Annelida and Platyhelminthes, respectively. Although the International Code of Botanical Nomenclature allows the use of the term "Phylum" in reference to plants, the term "Division" is almost always used by botanists.

The best known animal phyla are the Mollusca, Porifera, Cnidaria, Platyhelminthes, Nematoda, Annelida, Arthropoda, Echinodermata, and Chordata, the phylum humans belong to. Although there are approximately 35 phyla, these nine include the majority of the species. Many phyla are exclusively marine, and only one phylum is entirely absent from the world's oceans: the Onychophora or velvet worms. The most recently discovered phylum is Cycliophora[3] found in 1993; only three phyla were discovered in the last century.

The Cambrian explosion was a great flowering of life forms that occurred between roughly 542 and 530 million years ago; during this time all modern phyla (and many now-extinct ones) were established.[4] Over time the roles among different phyla have varied. For instance, during the Cambrian, the dominant megafauna, or large animals, were arthropods whereas now they are vertebrates (chordata).[5]

Scientific classification describes the following levels of organization (taxons) for classifying life forms: Kingdom, Phylum, Class, Order, Family, Genus, Species, Subspecies. Thus Phylum is a rather broad classification. Also, the Three Domain System is now widely used and adds the level of Domain above Kingdom as the broadest classification.

You could get more information from the link below...

2006-10-21 04:36:49 · answer #2 · answered by catzpaw 6 · 0 0

Which animal or plant do you like the most, or want to learn more about? Go with it's phylum. Not sure, pick a group no one else is doing (helps increase your grade), or throw a coin.

2006-10-19 17:20:05 · answer #3 · answered by Sir Ed 4 · 0 0

Mollusca are easy to find in most localities, since there are many terrestrial, fresh water and marine forms. And a lot of them are very interesting animals.

2006-10-19 18:28:24 · answer #4 · answered by PaulCyp 7 · 0 0

Echinoderms (starfish, brittle stars, sea urchins, feather stars)

Fascinating creatures.

2006-10-19 17:24:52 · answer #5 · answered by Anonymous · 0 0

Tardigrades aka water bears are so cool, and they're cute too.

http://en.wikipedia.org/wiki/Tardigrada

2006-10-19 17:29:38 · answer #6 · answered by Pseudo Obscure 6 · 0 0

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