What is the main difference between primary succession and secondary succession?

it takes hundreds of years to become stable.

if you have another question lmk.

endo:

regulates body hormones, aldosterone, vasopressin

neural:

signal, regulates body using electric signals, reflex

endo has to do with hormones; aldosterone and vasopressin are both hormones. i also had this question and got it right : d

allowed for the prediction of the properties of missing elements.