ib biology options
The biology course is organized by topics. Both standard level (SL) students and higher level (HL) students study the six core topics. In addition to this, both SL and HL students study two out of a choice of seven (at SL) or five (at HL) optional topics. Schools can pick which two options topics to cover. At DBC we have traditionally completed the Evolution (D) and Further Human Physiology (A) options. These two topics are not optional to learn.