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Chapter 28
| Question | Answer |
|---|---|
| What is a larval stage present in mollusks and annelids? | Trochophore |
| What is a structure that when contracted, cause the hinged shell of a bivalve to close? | Adductor muscles |
| What are hollow tubes through which a bivalve draws water into its body? | Siphons |
| What are tubular structures that are part of the excretory system of a mollusk? | Nephridia |
| What is an organ used by some mollusks to scrape fragments of food off rocks? | Radula |
| What is a heavy fold of tissue wrapped around a mollusk's visceral mass? | Mantle |
| What is the central section containing the organs in a mollusk called? | Visceral mass |
| What is the class of mollusks that includes snails and slugs? | Gastropods |
| What is another name for a sea slug? (a type of gastropod) | Nudibranch |
| What is a class of mollusks that includes oysters, clams, and scallops? | Bivalves |
| What is a class of mollusks that includes squids and octopuses? | Cephalopods |
| How many chambers are in the heart of a mollusk? | Three |
| What type of circulatory system do mollusks have? | Open circulatory system |
| What type of symmetry to mollusks have? | Bilateral symmetry |
| What are series of repeated structures along the length of the body in annelids called? | Segments |
| What is one of a pair of nerve cell clusters that serve as a primitive brain? | Cerebral ganglion |
| what is the internal body walls that separate the segments of most annelids? | Septa |
| What is the organ in an earthworm that grinds soil? | Gizzard |
| What is one of the external bristles or spines that project from the body of an animal? | Setae |
| What are flap-shaped appendages found in marine worms that allow the worm to swim, burrow, or crawl? | Parapodia |
| What is the strongest anticoagulant that leeches produce? | Hirudin |
| What fertilizes the soil and are found in earthworms? | Castings |
| Earthworms are members of what class? | Oligochaeta |
| What does a parasitic leech secrete into its host's blood? | Anticoagulants (a chemical) |
| If a foreign object gets lodged between the mollusk's mantle and shell, they respond by coating the object with what? | Nacre |
| What is another name for Nacre? | Mother-of-pearl |
| Even though earthworms have no eyes, they do have what other type of organs at each end of their bodies? | light-sensitive & touch-sensitive organs |
| What type of annelid is flattened, and its segments are not separated internally? | Leeches |
| When earthworms ingest soil, it moves into a storage chamber called...? | The crop |
| What phylum do snails, oysters, clams, octopuses, and squids belong to? | Molluska |
Created by:
cattle1010