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Bivalve

Bivalve

1. (Science: marine biology) a mollusk having a shell consisting of two lateral plates or valves joined together by an elastic ligament at the hinge, which is usually strengthened by prominences called teeth. The shell is closed by the contraction of two transverse muscles attached to the inner surface, as in the clam, or by one, as in the oyster. See mollusca.

2. (Science: botany) a pericarp in which the seed case opens or splits into two parts or valves.

Origin: f. Bivalve; bi- (L. Bis) _ valve valve.


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What is salt stress?

... the pain, an organism could undergo ANS and Endocrine (regulating systems (both involuntary) in the body) changes. Such, an organism such as a bivalve would respond by "clamming up", removing contact with the high/low salinities in water. Likewise, I also have a question. Osmoregularity ...

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by fastsandslash
Sat Jun 05, 2010 10:23 pm
 
Forum: Ecology
Topic: What is salt stress?
Replies: 8
Views: 13263

What kind of shellfish is in this coal gangue fossil?

Looks like a limpet to me, not a bivalve. Don't know about the golden layer.

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by wbla3335
Fri Mar 09, 2007 3:08 pm
 
Forum: Evolution
Topic: What kind of shellfish is in this coal gangue fossil?
Replies: 4
Views: 2692

What kind of shellfish is in this coal gangue fossil?

I'm no expert but it looks kind of like an echinoderm or a bivalve... good luck :/

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by AstusAleator
Mon Mar 05, 2007 2:07 am
 
Forum: Evolution
Topic: What kind of shellfish is in this coal gangue fossil?
Replies: 4
Views: 2692

Help figuring out what animals these are.

... which are in a different class. 3 has to be a bigger group (since it includes clams and mussels) than 2 (which is just a species), and bivalve shells are not really "exoskeletons." And what is it with tardigrades? This is the fourth discussion of them I've run into this week!

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by Darby
Tue Jun 20, 2006 4:44 pm
 
Forum: Zoology Discussion
Topic: Help figuring out what animals these are.
Replies: 11
Views: 6288

Organisms

Isn't a tadpole considered a larval stage? Clams only have gills because they are bivalves and no bivalve has lungs. If they breathe out of water they probably have some way of keeping their gill area moist. Also, clams don’t have a very well developed digestive ...

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by February Beetle
Mon Apr 17, 2006 8:00 pm
 
Forum: Zoology Discussion
Topic: Organisms
Replies: 29
Views: 10352
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