The Earth's lithosphere is a physical layer made of the and the uppermost part of the .
A. mantle; asthenosphere
B. mantle; crust
C. crust; mantle
D. asthenosphere; crust

What is the purpose of transcription? a. to copy the nucleotide in dna b. to form rna molecules from dna c. to produce a nucleic acid sequence from an amino acid sequence d. to link amino acids together to form stands of protein