Which is a vestigial organ

whale flipper human appendix, snake tail

human appendix

Explanation:

vestigial means of an organ or part of the body, that has become functionless in the course of evolution

it cools slower in the earth meaning the crystals have more time to form than lava on the surface

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.