Which of the following is NOT a reversible reaction?
a cutting a tree into logs
b. Dissolving sugar into water
c. Melting chocolate
d Tying your shoes

the solar system used to have much dust particles option no d

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

i think? ?

gold is my favorite solid.