Blank 1) one parent two parents
multiple parents

Blank 2) Similar
Different
Identical

Blank 3) Sexual
Asexual

i think it would be b. tissue because an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.

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

i think the answer would be d