Can someone help me?

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation

Explain how sequences of amino acids in proteins can be used to reveal relationships among organisms.

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