When a rock first formed, it contained 8 milligrams of potassium-40. How much potassium-40 would remain after three half-lives? 1 milligram
O 2 milligrams
O 3 milligrams
O 4 milligrams

Which was most likely an effect on society that resulted from improvements in blood handling during world war i and world war ii?

Students commonly confuse saccharomyces cerevisiae and staphylococcus aureus when viewed on a microscope slide how could you microscopically differentiate

When a cell is in a solution that has the same concentration of water and solutes as its cytoplasm, the cell is said to be in a(n) solution. a. isotonic b. hypotonic c. hypertonic b. facilitated