How many types of atoms make up the structure of a single element

Which element forms the basis of all organic organisms a carbon b oxygen c hydrogen d nitrogen

What advantages does a pedigree have over a written passage?

19. a cell is viewed under a microscope and is found to have two nuclear envelopes and spindles that appear to be breaking apart. which phase of mitosis is the cell most likely in? a. metaphase b. prophase c. telophase d. anaphase