PLEASE ANSWER ASAP FOR BRAINBLEST the primary site of new blood cell production (circulating blood cells) *
A. immune system
B. Thymus
C. Bone marrow
D. B and T cells
E. Secondary lymphatic tissues

What is the difference between an igneous, sedimentary and metamorphic rock

Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. the decay rates of isotopes are constant and are expressed as .

Ineed to get this test done which of the following statements is correct in hour our immune system responds to a potential pathogen? a.) the skin will be the first line of defense, and then the many phagocytes in the bloodstream will attempt to consume the possible pathogen. b.) b cells will start reading the antigen code immediately and call t cells to assist in destroying the pathogen. c.) the adapted immune system will call on the innate immune system to destroy the pathogen. d.) the t-cells in the adapted immune systems are the first to recognize the pathogen