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Ch 35 Bio
| Question | Answer |
|---|---|
| Segmentation is an advantage for annelid worms because it | is accompanied by the duplication of some internal organs |
| An earthworm uses its setae to | grip the soil surface |
| What feature(s) do both annelids and mollusks share? | They are coelomates |
| Which structure makes the shell in a mollusk? | Mantle |
| What is the name of the feeding structure that is used by most gastropods? | Radula |
| Which class of Mollusk does not have a radula? | Bivalves |
| Gastropods undergo a process called _________________ where the visceral mass twists around 180 degrees in relation to the head | Torsion |
| How many siphons does a clam have? | 2 |
| Which class of Mollusks have a closed circulatory system? | Cephalopoda |
| How many tentacles does a squid have? | 10 |
| What structure allows water to flow over it for the exchange of carbon dioxide for oxygen. | Stoma |
| One difference between leeches and polychaetes is that leeches | Do not have setae |
| All annelids in the classes Oligochaeta and Hirudinea have | segmented coeloms |
| What is the role of the typhlosole? | increase surface area available for digestion and absorption |
| What structure allows earthworms to eliminate cellular wastes and excess water? | nephridia |
| Polychaeta means | many bristles |
| Where is chitin secreted from in an earthworm? | clitellum |
| What is the smallest class (in number) of annelids? | Hirudinea |
| Most aquatic mollusks and annelids have a larval stage of development called a ______ | nauplius |
| The main function of the gizzard in an earthworm is what? | to grind soil |
| What structure allows water to leave bivalves after going over the gills? | excurrent siphon |
| How do polychaetes differ from earthworms? | Polychaetes have many setae and a distinct head while earthworms lack the two. |