Continuous cell lines differ from primary cell lines in that question 12 options: a. viruses can be grown in continuous cell lines. b. continuous cell lines can be maintained through an indefinite number of generations. c. continuous cell lines always have to be reisolated from animal tissues. d. continuous cell lines are derived from primary cell lines. e. continuous cell lines are from human embryos.

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.