The key distinction between invertebrate and vertebrate immune systems is that invertebrates seem to lack gene rearrangement and thus fail to produce soluble , among other things.

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

substitution is the answer in this case

thinking it would be physical characteristics

i'm guessing this is from edg enuity so the answers would be, from top to bottom,

theodor schwann

matthias schleiden

robert hooke

rudolph virchow

anton van leeuwenhoek