Coevolution is a process in which species?
a. evolve similar characteristics in different habitats
b. become increasingly different from each other
c. become extinct and are lost permanently
d. evolve in response to changes in each other

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