I'll give this illustration drawn by a scientist is based on observations of a cell under a microscope. which statement best describes the anaphase of mitosis? examining cells
a. in this stage, the chromosomes begin to spread out across the center of the cell.
b. this stage makes the cell's chromosomes more compact before the nucleus breaks down.
c. this stage is where the spindle fibers pull away from the cell's center.
d. in this stage, the unneeded spindle begins to break down.

Tooth enamel consists mainly of the mineral calcium hydroxyapatite, ca_10(po_4)_6(oh)_2. trace elements in teeth of archaeological specimens provide anthropologist with clues about diet and diseases of ancient people. students at hamline university measured strontium in enamel from extracted wisdom teeth by atomic absorption spectroscopy. solutions with a constant total volume of 10.0 ml contained 0.726 mg of dissolved tooth enamel plus variable concentrations of added sr. added sr find the concentration of sr in the 10 ml sample solution in parts per billion = ng/ml. find the concentration of sr in tooth enamel in parts per million = mu g/g.