1 Biologya branch of knowledge or study dealing with a body of facts or truths systematically arranged and showing the operation of general laws:the mathematical sciences. 2  Biologysystematic knowledge of the physical or material world gained through observation and experimentation.
Bracha Alpert has identified three different patterns of classroom discourse: (1) silent (the teacher talks almost all the time and asks only an occasional question),(2) controlled (as in the excerpt above), and (3) active (the teacher facilitates while the students talk primarily to each other).
He outlined six characteristics of discourse communities: 1) common public goals; 2) methods of communicating among members; 3) participatory communication methods; 4) genres that define the group; 5) a lexis; and 6) a standard of knowledge needed for membership (Swales, 471-473). Reference: Borg, Erik.