Proposals are classified in two ways: internal versus external, and solicited versus unsolicited.
true / false
which is one of the reasons analytical reports are more challenging to write than informational reports?

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