Which gas is strongly correlated with earth's heating and cooling patterns

Before the can be observed by using a transmission electron microscope, cells are sliced into very thin sections. what disadvantage does this procedure present in the study of cellular parts

Which of the following is not considered an appendage of the skin? nails glands follicles none of the above

Agene editing technology called crispr-cas9 uses cellular machinery to change the cell's genetic material. how might this technology be useful in treating diseases like cancer?