Indicate true (T) and false (F) statements below regarding differentiation of blood cells. Your answer would be a four-letter string composed of letters T and F only, e.g. TTTT.
( ) Most blood cells are derived from the pluripotent stem cells by a few cell divisions.
( ) Commitment to a specific differentiation path is a stepwise process.
( ) Upon contacting connective-tissue cells of the bone marrow, hematopoietic stem cells lose their stem-cell character and differentiate.
( ) Committed hematopoietic progenitor cells typically divide rapidly.