Perforin is a protein that is released by in order to plasma cells; kill target cells cytotoxic t cells; kill target cells b memory cells; switch from igm to igg b cells; bind to epitopes t- cells; stimulate b cells

Which phase of the cell cycle ensures that identical copies of the dna are made for daughter cells?

Which of th following best describes how genes produce traits in an organism?

High blood pressure occurs when there is too much blood flowing through the blood vessels at one time. by changing the amount of water in the blood, blood pressure can change. the excretory system can to lower blood pressure. which would most likely occur in the kidney? a)more water would be transferred from the nephron. b)less water would be absorbed into the nephron. c)the amount of water in the bladder would decrease. d)the amount of water in the blood would increase.