Final answer:
Red blood cells lack nuclei at maturity and contain hemoglobin, which distributes oxygen throughout the body. White blood cells lack both nuclei and hemoglobin.
Step-by-step explanation:
b. Red blood cells lack nuclei at maturity and contain hemoglobin, which distributes oxygen throughout the body. White blood cells are primarily involved in the immune response to identify and target pathogens. They lack both nuclei and hemoglobin.