A scientific theory is based on thorough observation and experimental evidence. Before the 1950s, genetic material was believed to be stored in proteins. However, in 1952, scientists experimentally proved that genetic materials are instead stored in nucleic acids, such as DNA and RNA. All the previous scientific knowledge about genes was still included in the new DNA gene theory, it was just modified to include that genes are coded by DNA and not proteins. Which of the following is true?

Read this summary of a scientific theory: "cells are the most basic structural and functional units of life. all living organisms are made up of one or more cells. all cells that are alive in the world today came from pre-existing cells." which of the following would require this theory to be modified? -a.) a survey finds that a majority of people believe viruses carry out the basic processes of life. -b.) a prominent scientist says she feels strongly that one day the theory will be challenged by life on other planets. -c.) the dna of unicellular and multi-cellular organisms is shown to have many fundamental similarities. -d.) scientific observations show that microscopic organisms living in the deep ocean are not made up of cells.