Apheromone is:
a: a substance that only is used when an animal is in danger.
b: a type of equine.
c: a chemical that can alert other living things.
d: a brain wave

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