Place the following events in activation of a b cell by a microbe in the order in which they would occur.
several rounds of division occur, producing many b cells that all express the same b cell receptor.
a b cell differentiates from a lymphocyte stem cell, and the mature b cell expresses a specific type of b cell receptor on its cell membrane.
the b cell's bcr (b cell receptor) binds to a foreign antigen with high specificity and high affinity.
second messenger signaling is activated in the b cell.
gene expression is altered in the b cell, and the b cell begins to divide.

The proper order is as follows-

1) A B cell differentiates from a lymphocyte stem cell, and the mature B cell expresses a specific type of B cell receptor on its cell membrane.

2) Gene expression is altered in the B cell, and the B cell begins to divide.

3) Several rounds of division occur, producing many B cells that all express the same B cell receptor.

4) The B cell's BCR (B cell receptor) binds to a foreign antigen with high specificity and high affinity.

5) Second messenger signaling is activated in the B cell.

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.