Learning Objectives:

1.A.1:  Natural selection is a major mechanism of evolution.

2.A.2:  Organisms capture and store free energy for use in biological processes.

2.A.3:  Organisms must exchange matter with the environment to grow, reproduce, and maintain organization.

2.C.1:  Organisms use feedback mechanisms to maintain their internal environments and respond to external environmental changes.

2.C.2:  Organisms respond to changes in their external environments.

2.D.4:  Plants and animals have a variety of chemical defenses against infections that affect dynamic homeostasis.

2.E.2:  Timing and coordination of physiological events are regulated by multiple mechanisms.