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35-1 Bio
| Question | Answer |
|---|---|
| One advantage of a coelom over a pseudocoelom is that a coelom..... | Allows body muscles to contract without hindering digestion |
| One feature that is shared by many mollusks and annelids is the.... | Trochophore |
| Mollusks in the class Gastropoda.... | |
| Bivalves have all the following structures except the..... | Radula |
| An octopus generally moves by.... | Crawling along the bottom with its tentacles |
| What are the two main regions of the mollusk's body? | The head-foot and the visceral mass |
| What region of a mollusk's body contains most of its internal organs? | The Visceral mass |
| What region of a mollusk's body is involved with locomotion? | The head-foot |
| What is the usual function of a mantle in a snail or clam? | It protects the soft bodies of mollusks |
| What feeding method do Bivalves use? | Filter-feeding |
| What feeding method do Gastropods use? | They feed through their radula |
| How do marine clams reproduce? | By shedding sperm and eggs into water. Fertilizes externally |
| How do freshwater clams reproduce? | Eggs are fertilized internally by sperm that enter through the incurrent siphon |
| Visceral mass | Contains the heart and the organs of digestion, excretion, and reproduction. |
| Mantle | is a layer of epidermis covering the visceral mass |
| Hemolymph | Circulatory fluid collected from the gills or lungs |
| Hemocoel | Blood cavity |
| Incurrent siphon | Siphon where water enters |
| Excurrent siphon | Siphon where water leaves |