Adult Sea Squirts lack all four of the chordate characteristics EXCEPT: a. pharyngeal slits. c. a notochord.
b. hollow nerve cord. d. tail.

cell regulation is conducted by special proteins.

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

affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.

if someone had the list of traits you provided