To connect skeletal muscles to bones.
I believe the answer is D
I'm not sure about number 1 or number 6, but I know that 3 is nucleic acid and 5 is solution.
scientists can test differences of the area with pigmentation by observing which is lighter and which is darker however they use microscope to look the difference of the pigmentation over the cells.
The main difference<span> is in the presence of a carbon atom. O</span>rganic compounds<span> will contain a carbon atom.</span><span> Do you have answer choices?</span>
