Which of these is a process by which water, carbon dioxide and energy are formed? A)heating of sugar
B)dissolving of sugar
C)oxygen reacting with sugar
D)hydrogen reacting with sugar

Some mining processes involve removal of large areas of earths surface in the mined region this practice causes severe environmental damage by allowing which natural process to accelerate in the affected areas? a.precipitation b.erosion c.migration d.condensation

20 the compound al(nh3)2 has atoms of nitrogen.

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