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bio 2 lab exam 1
| Question | Answer |
|---|---|
| -composed of a single cell that lacks a cell wall -undergo heterotrophic metabolism (like animals) -some may be photosynthetic | protozoa |
| protozoan examples? | Amoebas Paramecium Blephorisma Spirostomem Voticella Stentora Volvox |
| unspecialized ciliates | paramecium, blephorisma, spirostomem |
| specialized ciliates | vorticella and stentora |
| which is an obligitory colonist? | volvox |
| true body cavity | coelem |
| can engage in both autotrophic and heterotrophic nutrition | euglena |
| move by extending fingers of protoplasm called pseudopodia | amoeba |
| "sun animals" | heliozoans |
| probably the most diverse and speciose group of protozoans | ciliates |
| some of the largest known animal-like cells | stentor (mouth thing that looks like a bell) and spirostomum (freaky worm things) |
| animals without a coelem (phylums) | porifera, cnidaria, platyhelmenthes, nematoda, rotifera |
| example of phylum porifera? | sponges (no true skeletal system or muscles) |
| stinging filaments possessed by the vast majority of cnidarians | (venomous) nematocysts |
| fresh water hydra are what class? | class hydrozoa (phylum cnidaria) |
| body form attached at a base with a tentacle extending upward | polyp |
| a true jellyfish belongs to what class and phylum | class scyphazoa, phylum cnidaria |
| body form upside down and with tentacles extending downard | medusa |
| portuguese man 'o war | phylum cnidaria |
| head position of hydra is a? | polyp |
| has radial symmetry | cnidaria |
| has bilateral symmetry and cephalization (development of a true head); three germ layers | platyhelmenthes |
| tapeworms and flukes are what phylum? | platyhelmenthes |
| how much of platyhelmenthes are parasites? | 70% |
| flukes are what class and phylum? | Class Trematoda; phylum platyhelmenthes |
| tapeworms are what class and phylum? | Class Cestoda; phylum platyhelmenthes |
| harboring sexually reproducing adults? | definitive |
| harboring only asexually reproducing stages) | intermediate |
| many parasitic, but mostly free living; partial musculature; vinegar eels and heartworm | nematoda |
| the pseudocoelomates? ("false" body cavity) | nematoda and rotifera |
| free-living, have corona (ciliated region at anterior end) | rotifera |
| animals with a coelom | annelida, mollusca, arthropoda, echinodermata |
| coelomate organisms have a body cavity completely lined with? | mesoderm |
| coelom strongly expressed; distinctly segmented | annelida |
| earthworms are what class and phylum? | class Oligochaetes (have small bristles on outer skin); phylum annelida |
| sandworms are? | Polychaetes (also have small bristles (setae) and are mostly marine) |
| leeches are what? | class hirudina phylum annelida |
| -presence of jointed appendages -exoskeleton made of chitin | arthropoda |
| sub-phylum chelicerata (of arthropada) | -most primitive -lack antennae -horseshoe crabs, arachnids, scorpions |
| extremely venomous, longer legs and antennae | centipedes |
| larger, more legs, herbavores | millipedes |
| centipedes and millipedes are both part of what sub-phylum and class? | Sub-phylum Uniramia; Class myriopodia |
| -closely related to humans -“Spiny Skin” and radial symmetry as adults | Echinodermata |
| -Water vascular system -sea stars what class | Class Asterozoa; phylum Echinodermata |
| urchins, sand dollars, sea cucumbers what sub-phylum? | Sub-phylum Echinozoa (spiniest) |
Created by:
lnharrold