Vaccines are effective in preventing diseases because they? a. interfere with the release of suppressor t cells b. are antibodies directed against specific pathogens c. contain specific b cells and t cells d. trigger antibody formation

Control of the body is accomplished by which of the following body systems? nervous system and circulatory system endocrine and repertory system circulatory and respiratory systems nervous system and endocrine systems

2. how does the miller-urey experiment fall short of demonstrating that life can arise from inorganic molecules? explain. a. it doesn't show a leap between a collection of amino acids and a single-celled organism. b. it recreates the conditions that existed at the earth's beginning, but no molecules form as a result. c. it doesn't provide evidence of the formation of amino acids. d. it doesn't show how multicellular organisms developed from unicellular organisms

What is the next step in the process after a substrate enters the active site of an enzyme