Neptune is approximately 30 Astronomical Units (AU) away from the Sun. If you decided to create a scale model of the solar system where "Earth" was placed 2cm away from the "Sun," about how far away from the "Sun" would "Neptune" need to be placed in order for the model to be correctly to scale? a.30cm
b.60cm
c.75cm
d.150cm

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.

How does the nervous system affect the excretory system?

This is a scaffolding of protein fibers that us sell keep it shape in a cell division and cell movement