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Q. What kind of exoskeleton do some molluscs present?
Some molluscs, like gastropods and bivalves secrete an external calcareous carapace (the shell). Calcium carbonate is a fold in the epidermis, secreted by the mantle, forming the shell.
In pelecypods, the shell is made of two valves that contain and articulate the individual body within. In gastropods the shell contains only part of the body the visceral mass.
The fragility of erythrocytes The fragility of erythrocytes is impaired in the absence of NADPH generation due to the deficiency of glucose-6-phosphate dehydrogenase thereby ca
what is the problem that the theory of evolution and its rival theories try to solve?
ALCOHOLISM - Continual heavy consuming of alcohol is called alcoholism or drinking . Word alcohol is refered to C 2 H 5 OH or ethyl alcohol or ethanol or grain alcohol.
Extraradicular Infections Whatever the cause of post endodontic disease we should do proper diagnosis to determine what is the cause; is it intra or extraradicular infection ,
These circular orifices are located at the upper ends of the outflow parts of the left and right ventricles respectively. The pulmonary orifice which is 3 cms, is 0.5 cm larger tha
The peppered moth experiment was an example of directional selection; due to environmental conditions the directional selection shifted from one extreme to the other in 1850s Engla
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Graphs are a way to convey information and trends in a convenient fashion. For this week's Discussion Board you should search the internet for a graph related to biology. Provide u
Explain about the Saponins? These are a diverse group of compounds commonly found in legumes like soybean, lentils, chickpeas, peanuts and alfalfa sprouts. They are also presen
Bioinert Metals:- Commercially pure titanium/ titanium alloys Ceramics:- Aluminum oxide, zirconium oxide
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