Fraternal twins are similar genetically than are regular, non-twin siblings.

Which codon is the code for the amino acid histidine (his)?

Heat from earths interior and pressure from overlying rock transform the remains of marine sediments into

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