Change the following data into scientific notation. 0.000 421 g

4.21 x 10 to the -4th power

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.

x would be the most and the least would be y because there are more fruit   and seeds than flock z has insects