The source for many of the labs is AP Biology Lab Manual . Some of these laboratory investigations are modified to meet the time restrictions of the course or modified to allow the incorporation of probes. The course incorporates 25% of the instructional time. The majority of the laboratory investigations are inquiry based at various levels. They range from guided inquiry to open inquiry investigations. In addition to the investigations found in the AP Biology Lab Manual , students will be engaged in a number of other investigations that supplements the curriculum.