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Zoology
lecture 12, test 2
| Question | Answer |
|---|---|
| annelids | segmented worms; ext fertilization e.g. oligochaeta, polychaeta and hirudinea |
| metamerism | segmented |
| muscles act apon fluid filled skeleton | |
| tagmata | -ation; regional differentiation |
| cephalization | dvpg of head |
| polychaets | marine, epitoky; filter feeders, foraging, scavengers; jaws, scentsory tentacles, parapodia, bristles |
| oligochaeta | terrestrial, earthworm; monoecious w/clitellum; only land animal w/ext fertzn releasing eggs and sperm which swim freely and it becomes cacoon; benthis, borrow in lose, damp soil for dead nd decaying vegetation; have pharynx, crop, gizzard; can get 12 ft |
| hirdinea | freshwater, leech; monoecious w/clitellum; becomes true egg; 34 segm, anterior & oral sucker; predators; like inch worm; make hole in predator and use muscle suckers to get meal; vulnerable b/c only move when eat; eat snails |
| epitoky | asexual reprod; when tide is right polychaets pinch in 1/2 (1 stayin on bottom, the other is part w/gonads and swim to surface); giv off lite nd rupture gammetes w/several other gammetes |
| oligo mvmnt | grip walls w/longitutinal muscles so prey (bird) cant get it, but eventually relax and can pull them out of hole |
| leech-hirudinea | used medically for drawing blood and body fluids; sign of good healthy ecosystem; not bad, can get off with dull knife (story of bat traps in water) |
| phylum arthropoda | lrgst, fresh/marine, terrestrial; exoskeleton -1st grp to start flying - |
| exoskeleton | CaCO3 skeleton or manufacture sugars & proteins in body-chitin; epicuticle, |
| chitin | can be rigid and dense e.g. beetle; |
| epicuticle | waxy outer layer, more dense and rigid |
| protocuticle | exo/endocuticle |
| hypodermis | cells that layout the skeleton |
| tergum | dorso plate |
| sterum | ventral plate |
| pleuron | sagital plate |
| legs | endocuticle w/elevated area-apodenes (muscle attachment sights for mvnt |
| ecdysis | every species has to molt until has certain # then never molts again; exo/endoskeleton; crawls out of shell and have soft moist skin (do at night b/c vulnerable) appear white |
| direct development | molt and grow |
| metamorphosis | change to become an adult: incomp/comp |
| complete met | have to shut down everything, insects; change forms in a cacoon e.g. caterpillar/butterfly, maggot/fly |
| incomplete metamorphosis | aquatic e.g. dragonfly |
| subphylum | diff in # antenna & legs; cephalothorax/ab, head/thor/ab, segmented |
| subp nomenclature | Chelicerata, Uropygr |
| subp Chelicerata | cephalothorax, compound eye, chelicery, pedipalps w/no mouth parts |
| chelicery | k |
| Class Arachida | order scorpiones |
| order scorpiones | dsnt have jaws, telson, pedipalps, pectin organ |
| pectin organ | at junction of ab/thorax, picks up vibration |
| scorpiones reprod | female releases silk that hardens, laiden w/horomones saying come get me, not wambam and done, but courtship-hold pedipalps-get excited and drop sperm packet. f lines genital pore over sperm; come out as scorpions & crawl on ab & eat her food |
| Order Uropygi | vinegaroon -telson for whiplike structures -not venemous, compensate w/big pedipalps -defense: telson releases mild acetic acid that smells like vinegar |
Created by:
Jamie D
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