Multiple Choice questions on how hair and eye color affect each other. How does hair color and eye color affect each other?

A
They can cause the trait for brown eyes to automatically pair up with the trait for brown hair.
B
They do not affect each other that much, but they are often on the same allele.
C
They can cause the trait for blue eyes to automatically pair up with the trait for blond hair.
D
They do not affect each other because they are separate and distinct alleles.

Explanation: The reason why these two traits are linked is that the genes responsible for hair and eye color happen to be close together on the same chromosomes. When genes like these are close together, the traits tend to end up coming in pairs (blonde hair/blue eyes, etc.).

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.