By definition, basalt is an aphanitic igneous rock with less than 20% quartz and less than 10% feldspathoid by volume, and where at least 65% of the feldspar is in the form of plagioclase. Basalt features a glassy matrix interspersed with minerals.The average density is 3.0 gm/cm 3.y definition, basalt is an aphanitic igneous rock with less than 20% quartz and less than 10% feldspathoid by volume, and where at least 65% of the feldspar is in the form of plagioclase. Basalt features a glassy matrix interspersed with minerals.
An antigen is defined as a substance that reacts with antibody molecules and antigen receptors on lymphocytes. 2. An immunogen is an antigen that is recognized by the body as non-self and stimulates an adaptive immune response. 3. Chemically, antigens are large molecular weight proteins and polysaccharides. 4.
Sometimes the adaptive system is unable to distinguish foreign molecules, the effects of this may be hayfever, asthma or any other allergies. Antigens are any substances that elicit the adaptive immune response. The cells that carry out the adaptive immune response are white blood cells known as lymphocytes.