What is a similarity between concepts and categories? a)Categories and concepts are ways to group each other.
b)A category can exist without any concepts and vice versa.
c)Concepts and categories involve thoughts.
d)Both require extra reasoning.

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes