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ZoologyT2D2
Day 2 lecture notes zoology
| Question | Answer |
|---|---|
| they have 160,000 known species but only 90,000 left | Phylum Mollusca |
| They are among the most primitive of all large animals that a fossil record exists for | Phylum Mollusca |
| They have hard shells and they fossilize and leave great fossil record | Phylum Mollusca |
| They tell us about the earth at it early stages | Phylum Mollusca |
| _____found on mountain tops tells about the earth's history | Phylum Mollusca shells |
| These are important to Geologist b/c they use them for dating strata | Phylum Mollusca fossils |
| These are important to Ecologist because of the way they feed many are filter feeders incredibly effective | Phylum Mollusca |
| Filter feeders that clog grates for underwater turbines they also filter sediment out of water stealing nutrients from other organism | zebra muscle have a big ecological impact |
| These are used to pave roads, as a calcium source,used as fertilizer and have a large economic impact | oyster squid octopus and calamari |
| ________were tusk shaped and used as money in some civilizations. | Dentalium |
| This was a mollusk that attacked wooden boats | ship worm |
| ______are intermediate hosts for many animals for ex.trematods | Mollusk |
| These animals contributed to our evolutionary understanding, and have a true body cavity. | Mollusk |
| These animals show true segmentation...most ____lack true segmentation. | Mollusk |
| These segmented worms have a lot of correspondence with mollusk | Phylum Annelida |
| Phylum Mollusk and Annelida have_______ larvae | trochophore-Atrochophore is a type of free-swimming planktonic marine larva with several bands of cilia |
| Segmentation helps mollusk increase ________ | mobility |
| Some have a ______skeleton | hydrostatic |
| Phylum Mollusk and Annelida evolved from _________ | a common ancestor, mollusk split off before segmentation |
| Most mollusk have a calcareous ______. | shell |
| The inner lining of a mollusk shell is called | nacreous layer, mother of pearl very iridescent |
| The outer protective layer of the shell is called the _______ | periostracum |
| The soft inner lining of the shell and the soft tissue of the body ...secretes nacreous | the mantle |
| this mollusk structure contains the gills,anus, and the terminal opening for euragenitals | the mantle cavity |
| In mollusk these are very effeicent large surface area for extracting O2...some species have lost them. | the gills |
| If the gills have been given up then metabolism is typically __________. | slowed |
| Mollusk have ______digestive system that is ______from mouth to anus | complex, complete |
| Mollusk have a tounge like structure covered with chitinous structures that look like teeth called _______ | radula |
| This phylum eats algae, macro invertebrates and some vertebrates and by filtration ( highly effecient water pump | Phylum Mollusca |
| Some ______are very active predators, some have toxins to kill and subdue | mollusk |
| Mollusk have efficient digestive & respiratory which means they can ________ | get big |
| Some mollusk use a _____ and ______cyphon to jet water for propulsion | incurrent, excurrent |
| The muscle thats used to connect two half shelves is called the _____. | foot |
| Sea scallops use their shell to move by _________. | clapping |
| The foot is pushed down in to the substate to help the organism | move a bit |
| These glide on a muscular foot and include snails and slups | Gastropod |
| _______ means "head foot" and includes squid, octopus, and the nautaliss and the only use jet propulsion only | cephalopod |
| The nervous system is most developed in the_______ but present in all mollusk | cephalopod |
| All mollusk have a heart but most of them have an ___________ system. | open |
| ________have closed circulatory system | cephlapods |
| The _______ is a type of kidney that opens into a coelom and is a mechanism used to maintain water balance. | metanephridium |
Created by:
joefrank1982
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