Learning Objectives:

1.A.2:  Natural selection acts on phenotypic variations in populations.

1.B.1:  Organisms share many conserved core processes and features that evolved and are widely distributed among organisms today.

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

2.E.3:  Timing and coordination of behavior are regulated by various mechanisms and are important in natural selection.

3.E.2:  Animals have nervous systems that detect external and internal signals, transmit and integrate information, and produce responses.