Which explains why it is important to eat a full healthy meal before an afternoon of playing sports?

A. Food provides the carbon dioxide that is a product of cellular respiration.
B. Food provides the oxygen that is a product of cellular respiration.
C. Food provides the glucose that is a reactant in cellular respiration.
D. Food provides the energy that is a reactant in cellular respiration.

clinically, some people often have repeated allergies, eczema and respiratory infections or other parts of the infection, in this case, in addition to some routine tests such as tests for white blood cells, immunoglobulin series, lymphocyte subsets, etc., the five immune immunoglobulin tests are also necessary.

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.