What of the following is a major difference between site-specific recombination and transposition?
a. transposition is much more carefully controlled than site-specific recombination.
b. site-specific recombination involves two defined sequence elements, whereas transposition involves the movement of a specific sequence to a nonspecific site in the dna.
c. transposition involves two defined sequence elements, whereas site-specific transposition involves the movement of a specific sequence to a nonspecific site in the dna.
d. site-specific recombination is much more carefully controlled than transposition.

Which of the following statements is correct in hour our immune system responds to a potential pathogen? a. the adapted immune system will call on the innate immune system to destroy the pathogen. b. b cells will start reading the antigen code immediately and call t cells to assist in destroying the pathogen. c. the skin will be the first line of defense, and then the many phagocytes in the bloodstream will attempt to consume the possible pathogen. d. the t-cells in the adapted immune systems are the first to recognize the pathogen vaccines are weakened forms of disease causing microorganisms, which are given to patients to prevent disease. after the vaccine is administered, the immune system responds by creating a(n) to recognize the a. antigen, antibody b. antibody, antigen c. antibody, antibiotic d. antibiotic, antibody