If you are absent, you are responsible for finding out what you missed from your classmates. Your syllabus has a full schedule of lecture topics, readings and lecture exams. There is only one grade for the entire class. There is no separate grade for lecture and lab. Please attend the lab in which you registered unless you make other arrangements.
Quizzes derive from labs, so attendance is a necessity.
If you are absent, you are responsible for finding out what you missed from your classmates. Your syllabus has a full schedule of lab topics, readings and quizzes. You are responsible for about 12 labs. Major quizzes only cover the material since the last quiz. They are not comprehensive.