The principal characteristic that determines whether an aquatic ecosystem is classified as marine or freshwater is ) surface area(b) water depth(c) temperature(d) salinity

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

you should wear a lead protective shield when having teeth x-rays

hope i

-lavira : )

a chain link fence because there so tiny even my albino donkey can't get out