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These are called valves- some molluscs have two and are called BIVALVES, whilst others have three and are called TRIVALVES. The latter are held to be higher up the evolutionary scale. The bivalves are the clams, mussels, oysters and scallops. The adults all have two hinged shells (valves). Some of these animals circulate water carrying the microorganisms that they eat and oxygen for respiration through tubes called "siphons" that they can extend from between the shells on the anterior end so they can stay safely hidden in the mud or sand.
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How does the water and minerals move through the plant body?
They move through in tubes call xylem tubes while the food move through in tubes called pholem tubes.
What do you call a scientist working on mollusks?
A scientist who studies mollusks is called a teuthologist.
What do you call mollusks that have a single shell?
Univalves
What do you call a creature with two hearts?
worms mollusks
What do you call Building dams channels and walls to bring water to crops?
Irrigation.
What do you call the two tubes which contain cilia that go to the lungs?
Bronchial Tubes
Are aqueducts buildings?
No. Aqueducts are water transportation systems--you could call them large water pipes. They were/are used to bring water where it is needed.
What do you call a plant with no tubes?
non vascular
What do you call the ability of water to climb upward in narrow tubes?
The adhesive forces of the polar water molecules to the glass surface, breaks the surface tension of the water and causes a capillary action up the sides of the tube.
What do you call the finest branches of the bronchial tubes?
bronchioles
What do you call plants with tubes?
tha answer is vascular plants
What do you call the tubes that sub divide from the bronchi?
The bronchioles
