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24 Cards in this Set
- Front
- Back
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What do modern Bivalves use to attach them to the substrate? |
Cement or Byssyus |
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What is the Byssus |
It is a group of thread like structures made of the protein collagen. It is used to attach the bivalve to the substrate |
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What are the siphons used for? |
Feeding |
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What are the two different siphons called? |
Inhalant and Exhalent |
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What is the resting area? |
The part of the bivalve which is in contact with the substrate |
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How can you tell whether a bivalve had muscles? |
They leave a muscle scar |
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What is the mode of life of bivalves? |
Benthonic |
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True or False. Epifaunal Bivalves are Vagrant. |
Partly True. They can be both vagrant and sessile. |
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What does vagrant mean? |
It lives on the seas floor. Can be a scavenger or Predator. |
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What does sessile mean? |
Does not move around on the substrate. Can be attached or can just lie on the sea floor |
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How do sessile organisms eat? |
Filter Feeding |
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What does Benthonic Mean? |
The organism lives on or in the sediment substrate on the sea floor |
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What does Epifaunal Mean? |
It lives on the sediment substrate |
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What is a Mytilus Bivalve? |
A bivalve which is attached to the substrate with a Byssus |
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How does the Mytilus Bivalve protect itself from acidic rainwater or river water? |
It's shell is covered in a layer of periostracum |
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True or False. The Mytilus Bivalve has a strong shell? |
True. |
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3 examples of how the Mytilus Bivalve adapted to live in high energy environments. |
A Byssus to attach it to the substrate. A strong Shell. Streamlined. |
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How do the Mytilus Bivalve prevent the shell from drying out during low tide? |
Large adductor muscles. To hold the valves tightly together. |
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How does the Ostrea Bivalve attach itself to the substrate? |
It secretes cement. |
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In Ostrea Bivalves where is the cement secreted from? |
The Mantle. |
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Which type of Epifaunal Bivalve used cement to attach itself to the substrate? |
Ostrea. |
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True or False. The Ostrea Bivalve has a thick shell? |
True. It has a strong thick shell to protect it from high energy currents. |
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What type of Epifaunal Bivalves live in High-energy environments? |
All. - Mytilus. - Ostrea. - Graphaea. |
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How has the Ostrea Muscle adapted to living in High-energy environments? |
Cement. Strong, thick shell. A strong adductor muscle. |
