What is typical of cell reproduction when normal cells are reproduced in a petri dish from a tissue culture? check all that apply. 1. cells reproduce only when there is room in the petri dish. 2.cells reproduce one layer thick and then stop reproducing. 3. cells undergo unlimited reproduction by mitosis. 4.when a cell dies or is damaged, a new one is created to fill the empty spot.

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