In this situation, the rabbit is the primary consumer because it feeds off the producer (grass) and is eaten by the secondary consumer (snake).
Answer:
In the human adult, the bone marrow produces all of the red blood cells, 60–70 percent of the white cells (i.e., the granulocytes), and all of the platelets. The lymphatic tissues, particularly the thymus, the spleen, and the lymph nodes, produce the lymphocytes (comprising 20–30 percent of the white cells).
There are no answer choices, but I know the mitochondria create energy for the cell.
Hope this helps at least a little :)
