Which of these is not classified as an organism?

a)kidney
b)tree
c)lizard
d)protozoa
*most of my questions are science but there is no science option*

Respuesta :

is it kidney since its an organ

A. Kidney.  Organisms and organs are not the same thing.  Organisms are made from organs but they are not the same.  Kidneys are vital organs not organisms, therefore the answer is A.