Yes animals and plants use oxygen in respiration to produce carbon dioxide. All living things carry out cellular respiration 24 hours a day.
C. Decomposers break down dead animals and plants. They return the nutrients to the soil.
<span>E. Stimulation of T-cell by APC</span>
The initial exposure of the body to an infectious agent e.g. through a vaccine, triggers an immune response most of which rapidly diminishes after the vaccination. However some cells of the immune system called lymphocytes remain with a memory of that pathogen.As a result, if the same pathogen infects a vaccinated person, the memory cells remember and recognize it and rapidly spring into action triggering a much more rapid response specific to that pathogen than the initial exposure, effectively dealing and neutralizing the pathogen.
B.An advertisement for acne medication claims it can clear up acne in less than one week.