Answer:
Directly counting blood cells or tissue cells by using a hemocytometer can determine the concentration of a known volume. Counting the number of colonies that arise on a pour plate can calculate the concentration by multiplying the count by the volume spread on the pour plate.
Unlike photosynthesis, cellular respiration occurs in all eukaryotic cells. Photosynthesis is the opposite of cellular respiration. Photosynthesis takes place in plant cells, in chloroplasts.
The mantle is a layer of hot compressed rock underneath the liquid outer core, which means that it is much hotter. It is heated by the inner core, and the magma rises upward towards the outer core. This eventually cools and sinks back down, only to be heated up again, and this goes on and on in a constant cycle.
Carbon dioxide (CO2). Inorganic carbon in the form of CO2 is assimilated/fixed into organic molecules by living organisms (primarily plants by photosynthesis).