Covering the fiscal year beginning July 1, 1980, and ending June 30, 1981, this annual report of the Assembly of Life Sciences (ALS) summarizes the major activities of this group. Information is organized into four sections: (1) The Executive Office; (2) The Division of Biological Sciences; (3) The Division of Medical Sciences; and (4) The Board on Toxicology and Environmental Health Hazards. Each section begins with an organizational chart which shows the structure within the ALS and the Assembly's relationship to the National Academy of Sciences. Activities within sections are mostly listed alphabetically. Committee entries include a summary description, list of members, staff, meeting dates, and summary of accomplishments. A list of ALS reports completed during this year and a list of ALS corresponding societies is provided in the back. (Author/DC)