Fill in the blanks to complete each statement about igneous rock formation.

rocks form when
cools below Earth’s surface.

rocks form when
cools on Earth’s surface.

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