bioprelim - Name Who are they? What are their important...

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Unformatted text preview: Name Who are they? What are their important characteristics? Who are their closest relatives? Annelida Earthworms and leeches and polychaetes. segmented worms Segmented bodies give them mobility for swimming and burrowing. Found in damp soil, the sea, and freshwater habitats. Polychaetes- many haired organism (sandworm), have stiff bristles called chaetae and many are marine Earthworms Annelida Eat their way through soil and have closed circulatory system. They are hermaphrodites. ---- Leeches Annelida Most are free-living carnivores (eat small invertebrates- snails, insects), but some suck blood. Some used for medicine.---- Insecta Insects- coleontera, hymenoptera, orthoptera, Lepidoptera (moths/butterflies), diptera Most diverse group of organisms. Three-part body: head, thorax, abdomen; 3 sets of legs; wings. Many undergo incomplete or complete metamorphosis. They live everywhere. Arthropoda Nematoda Roundworms, nematodes. They are invertebrates. Have a pseudocoelom and a complete digestive tract, covered by protective cuticle. Most are free-living, others are plant/animal parasites. Bilateral symmetry. Important decomposers Flatworms Arthropoda Lobsters, insects, etc. The diversity and success of them are largely related to segmentation, exoskeleton, and jointed appendages. Lots of them in a lot of places with great diversity. Go through molting. Insecta, Arachnids Protista Algae and Protozoa Extremely diverse, mostly unicellular eukaryotes, traditionally grouped as protozoa and algae. Eukaryotes includes several monophyletic groups of protists. Most are aquatic. Considered simplest and oldest eukaryotes. Plants, animals, fungi Protozoa amoeba Heterotrophic, eating bacteria and other protists. Very animal like in their eating. protista Algae Protista Synthesis food by photosynthesis. Brown algae is large complex seaweeds, red algae contributes to coral reefs. Green algae can be unicellular, colonial or multicellular. Red and green are closest relatives of land plants. Land plants Bivalves Clams, oysters, mussels, scallops Have two shells and a siphon. Suspension feeders. Most are sedentary and have mantle cavity for gills and feeding. Have one foot for anchoring. Molluscs Clams Bivalve Look above Molluscs Snails Gastropods Only mollusks who lives on land. Has shell to go into when threatened. Eyes on tips of tentacles. Bivalves/Molluscs Cephalopoda Squid and Octopuses Head foots. Agile predators with a siphon, tentacles, eyes. Largest invertebrates, exhibit extreme behavioral complexity, ecological fishes. Small and internal shell or outer shell. Large brains. Molluscs Octopuses Cephalopoda Smartest invertebrates and have remarkable learning abilities. Does not have a shell....
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bioprelim - Name Who are they? What are their important...

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