In what way are the digestive and circulatory system alike A. Both protect organs in body

B. Both control movement in body

C. Both absorb gases or nutrients into body.

D. Both provide structurl support for body ​

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