What led to the conclusion that single-celled prokaryotic organisms evolved in the absence of oxygen

The probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder is

Patient has just received an organ transplant which treatment would be most effective in preventing the patient’s body from

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