One common approach is to start at the organic molecular level and progress through the cell, to the organism culminating with the biosphere. A biology course that follows chemistry will more likely use this orientation. The Circle of Life. Many students have a basic knowledge of their ecological environment so learners can use this knowledge as a framework upon which to build new knowledge. Once students develop a general understanding of interrelationships between organisms and their environment, they are curious about the origins of the diversity they observe.
Diversity is a result of the evolutionary process.
School with available natural resources or a history or interest in field biology are likely to choose this orientation. BSCS Green is one text that uses an ecological approach to biology. A third approach is to use human health and biology as the springboard into general biology. Teachers or communities with nearby health facilities, strong athletic programs, or health career pathways may likely choose this frame for their general biology course. Deep Themes in Biology.