3 Principles of Biology 241 Covers Metabolism and Cells 1. A bird dies in the forest.
Insects eat the soft parts of the bird and crawl away.
The remaining feathers blow away in the wind. The bird s entropy has become more positive. The bird s entropy has become more negative. The bird s entropy has stayed the same. When athletes run marathons their livers need to convert starch into glucose so that muscle cells will have a continuous supply of glucose as fuel.