Costs also have to be weighed.
If benefit cost, behavior is adaptive Function is to increase likelihood of genes of an individual animal being passed on to future generations through an offspring or relative. Nature vs. Nurture Innate behavior is genetically programmed, inborn, instinctive Learned behavior has been modified by experience All behavior has a genetic basis, then is modified by experience. Nervous and endocrine systems primarily affect behavior, influenced by animal s readiness, environment Motor programs are coordinated sequences of muscular actions. Genetically influenced behaviors Activated by sign stimuli or releasers. Birds imprint on first moving object seen.