The board of directors of a corporation shall consist of one or more individuals. The number of directors shall be fixed by or in the manner provided in the articles of incorporation or the bylaws, except as to the number constituting the initial board of directors, which number shall be fixed by the articles of incorporation. The number of directors may be increased or decreased from time to time by amendment to or in the manner provided in the articles of incorporation or the bylaws, but a decrease shall not have the effect of shortening the term of any incumbent director. In the absence of a bylaw providing for the number of directors, the number shall be the same as that provided for in the articles of incorporation. The names and addresses of the members of the first board of directors shall be stated in the articles of incorporation. Such persons shall hold office until the first annual election of directors or for such other period as may be specified in the articles of incorporation or the bylaws. Thereafter, directors shall be elected or appointed in the manner and for the terms provided in the articles of incorporation or the bylaws. Directors may be divided into classes and the terms of office and manner of election or appointment need not be uniform. Each director shall hold office for the term for which the director is elected or appointed and until the director's successor shall have been selected and qualified.