What do you call a Molecule Whose ends have opposite electric charge

In the family tree below, people with the recessive trait of attached earlobes are shaded gray.

Which of the following is a way that minerals are used? a. industry construction technology d. all of the above

What sentence best supports the statement that hormones are involved in the regulation of homeostasis? a. the hormone erythropoeitin increases the production of red blood cells when oxygen levels are low. b. the hormone oxytocin promotes labor contractions of the uterus during childbirth. c. the hormone melatonin induces sleep and its production is slowed by exposure to light. d. the hormone cortisol suppresses the immune system and is produced when the body is under stress.