What animal is an ewe?
Animals belong to the kingdom Animalia, and are eukaryotic organisms. This means that they have a defined nucleus separated from the rest of their cells by a double membrane.
- The animal kingdom is comprised of two main distinctions: vertebrates and invertebrates.
- Vertebrates form the phylum chordata, but invertebrates actually fall into ten different phylums: annelids, arthropods, bryozoa, cnidaria, echinoderms, molluscs, nematodes, platyhelminthes, rotifers, and sponges.
- The simplest of the animals is the sponge, which reproduces asexually, have unspecialized cells and no organ systems, as they get most of their nutrition from the flowing of water through the cellular layers.
- The chordates include mammals, birds, reptiles, and amphibians, among others.
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fromChapter 4 / Lesson 4
Did you know there are clones all around us? That's something many people don't realize. So what exactly are clones? This lesson investigates cloning, types of clones, and cloning's connection to extinct animals.