Please help with questions 4-9

Robert wants to know which fertilizer will work the best for his grass. what can he do to explore this inquiry?

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

What feature of cell theory is best demonstrated in the image