Which of the following terms means a group of connected or related objects or materials

Which best describes how parents affect the genotype of a child? a.the parents decide what to feed their child b.the parents choose whether to educate their child c.the parents allow their child to stay up late d. the parents pass along genes to the child

Is it considered muscle s ennervation if sympathetic fibers innervate the vessels within the muscle?

What causes darkening of the skin as melanin production increases