Term
| Name 8 kinds of invertebrates (no internal support structure present=no backbone)? |
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Definition
| 1.ponifera 2.cnidaria 3.flatworms 4. nematodes 5. mollusca 6.annelids 7.arthropods 8.echinoderms |
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Term
| What % of the earth is invertebrates? vertebrates? |
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Definition
| 97% invertebrates and 3% vertebrates |
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Term
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Definition
| Sponges, move only for a few days, pick one spot and stay there, only cells, no tissue |
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Term
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Definition
| greek = "nettle", ex. jellyfish,sea anemones,hydra corals, NO symmetry, *INVENTED TISSUE, carnivorous |
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Term
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Definition
| bilateral symmetry-(*<--invented bilateral), ex. flukes & tapeworms, beginnings of cephalization(having a head), no body cavity(simple organism) |
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Term
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Definition
| ROUND WORMS, cylinder shape (beginnings of digestive tubes),ex. hookworms=parasite |
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Term
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Definition
| "soft body", INVENTED CIRCULATORY SYSTEM,most have open circulatory system,2nd largest animal group:1)GASTROPODS=slugs,exoskeleton shell(mantle), 2)BIVALVES=mussels, clams,oysters,scallops,has 2 shell to enclose organism,3)CEPHALOPODS=squids,octopus,INVENTED "CLOSED CIRCULATORY SYSTEM", more mobile and efficient=fast |
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Term
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Definition
| SEGMENTED WORMS,INVENTED SEGMENTATION |
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Term
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Definition
| "jointed footed", INVENTED PAIRED, JOINTED APPENDAGES(legs &wings),exoskeleton-sheds once too big, 3 types:1)ARACHNIDS-spiders,tics 2)CRUSTACEA-crawdad,one land group=pill bugs,3)INSECTA-cockroaches, 900,000 species of insect |
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Term
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Definition
| internal support structure, most advanced-closest to humans,efficient at moving,Ex. sea star or sea urchin |
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Term
| Characteristics of vertebrates (internal support structure present) in Phylum Chordata? |
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Definition
| 1)NOTOCHORD - cartilage rod(replacement of spinal chord), 2)DORSAL NERVE CHORD - bundled nerves, separate but adjacent to notochord, 3)GILL SLITS - humans:enclosed by tissue and become lungs, 4)TAIL - humans:embryonic stages |
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Term
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Definition
| 1)Myxini, 2)Chondrichthyes, 3)Osteichthyes, 4)Amphibians, 5)Reptiles, 6)Birds, 7)Mammals |
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Term
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Definition
| hagfish - cartilage and skeleton, nothing eats it=produces black slime, MOST PRIMITIVE. |
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Term
| Details of chondrichthyes? |
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Definition
| Sharks, skates and rays, "cartilage fish",INVENTED JAWS |
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Term
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Definition
| bone fish, BONE IS BETTER, LIGHTER, CAN HAVE MUSCLES,ex. swordfish, complete bone skeleton |
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Term
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Definition
| FIRST GROUP TO LEAVE WATER!!!, bone skeleton, earliest land vertebrate,has to reproduce in water, moist living, need to develop new appendages |
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Term
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Definition
| First group to be on land!!!,1)INTERNAL FERTILIZATION,2)respiratory structure,3)AMNIOTIC EGG(waterproof shell),4)reproductive organs, 5)Desiccation - drying out, 6)scales - prevent skin from drying out, 7)TOOK OVER THE WORLD (400-500 million years)8)Crocs- INVENTED 4 chamber heart!,9) gave rise to birds and mammals |
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Term
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Definition
| 1)all but a few species can fly(penguins),2)no land predators,3)AMNIOTIC EGG(calcium eggs),4)no teeth, 5)legs have scales from reptiles, 6)light and strong skeleton(hollow bones ex.frigate bird=7ft wing span but only 4 oz.) |
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Term
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Definition
| 1)INVENT HAIR, 2)infants feed on milk from females, 3 groups: 1)MONOTREMES - ex. platypus,lay eggs like birds,babies fed milk,no teeth,MOST PRIMITIVE(earliest of its kind),2)MARSUPIALS - have a PATCH, not a placenta(sac for embryo)ex.kangaroos & possums, 3)PLACENTAL MAMMALS - have placenta,ex. humans & horses, more efficient in reproduction,no placentals in AUSTRALIA(<- continent broke off before placenta outburst) |
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