Which of these are MOST involved in exchanging gases? 1 point
heart
bladder
lungs
pituitary gland
lymph nodes

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

Which of the following can be reduced by the use of renewable energy sources? a. social costs b. economic costs c. environmental costs d. all of the above select the best answer from the choices provided a b c d

Sequence how oxygen accumulated in the atmosphere and the effect it had on life by completing the flowchart