Biochemistry/bioquímica:
So I need help

Which of the following is a cause of a dna mutation? o a. the linking of amino acid subunits into a long chain o b. the transcription of dna into rna o c. an error in the repair of damaged dna d. the diffusion of molecules across the cell membrane submit

Dna is colied into chromosomes in a cell

What is the ecological role of food chains and food webs