Changes in the gene pool can occur due to various mechanisms. from 1892 to 1954, millions of individuals emigrated (moved out) from countries across the atlantic ocean to the united states. many of these individuals entered through ellis island, a federal immigration station in new york. which mechanism affected the gene pool of the immigrants that entered the united states through ellis island?

Which class of organic compounds makes up the channels and pumps that move materials from one side of the cell membrane to the other? a.) carbohydrates b.) lipids c.) proteins d.) nucleic acids

Define the apical impulse and describe its normal location, size, and duration. which abnormal conditions may affect the location of the apical impulse? explain the mechanism producing normal first and second heart sounds. describe the effect of respiration on the heart sounds. describe the characteristics of the first heart sound and its intensity at the apex of the heart and at the base. describe the characteristics of the second heart sound and its intensity at the apex of the heart and at the base.

18. how do the cells in meiosis differ from the cells in mitosis?