The importance of nature versus nature is simply your belief of the way a person was raised determines their behavior, like a child being taught to hate and when they reach maturity they are more likely to hate (nurture), or the flipside a person who was raised to hate but when they get old enough to make their own decision on hate they decide it is not right (nature). What we know is a person height, weight, eye color, etc. is all genetically inherited. What we do not know is if a person behavior is based on their upbringing or their instincts. Hormones
Hormones are chemicals that are released into the body by cells or glands in order to influence other cells; together they are called the endocrine system. Hormones are stimulated and inhibited by many factors including mental activities. What play the roles in regulating the endocrine system are sunlight, temperature, and other hormones. Hormones are responsible for the stimulation of growth, hunger, sex drive, and immune system. It also plays a part in fighting, fleeing, puberty and parenting. If the endocrine system is out of balance you can see in a major way how it affects one behavior.
When the endocrine system is out of balance a person is more likely to become more sexual or less sexual, also a person can become more violent, or more or less emotional. For proof of this just look at some pregnant women attitude change while with child. Their hormones are out of balance with the change of their bodies so their changes are more obvious. There are seven glands within the body and they are the pineal gland, thyroid, pancreases, pituitary gland, gonads, and adrenal gland. Behavioral genetics Behavior genetics study the perception, learning and memory, motivation and emotions, personality, and psychological disorders.
Evolutionary psychology is one of many biologically informed approaches in the study of human behavior. Evolutionary behavior is the proposal that the relevant internal mechanism is adaptions products of natural selection that helped our ancestors get around the world, survive and reproduce. Evolutionary psychologys theory and methods are the brain is a computer designed by natural selection to extract information from the environment, the cognitive programs of human brains are adaptations, and natural selection ensures that the brain is composed of many different special purpose programs and not a domain general architecture.