The diagram shows a roller-coaster track. Assume that the system is closed. At point E, the roller-coaster has just exited the vertical loop.

Explain how the number of similarities between the embryos from early stage to late stage is used as evidence of a common ancestry

Tides that occur during the new and full moons

Milk production during breastfeeding is increased by the suckling of a newborn from his mother's nipple. this type of feedback mechanism best describes a positive or negative