The portions of an antibody molecule that interact with antigen are known as

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

Which number represents a basic ph, 4 or 9? numerical answers expected! answer for blank 1: i'll give

Which type of landforms forms at the plate boundary as a result of divergent stress