Question

1. in science, a theory is an explanation for some phenomenon that is based on observation, experimentation, and reasoning. one important theory in biology is the cell theory. what kinds of observations led to the development of the cell theory? a. testing of first vaccines b. discoveries of fossil bacteria c. isolations of dna and rna d. microscopic views of plants and animals 6. can the cell theory ever become a law? why or why not? 7. cell theory was first proposed in 1838. evidence obtained through additional scientific investigations resulted in the current cell theory. which statement describes a component of the original cell theory that was removed because of the new scientific knowledge? a. all living things are made of cells. b. all cells come from other preexisting cells. c. cells form through spontaneous generation. d. cells are the basic structural and functional units of life. 8. a scientist develops a hypothesis, designs an experiment, and obtains data that support her hypothesis. which of the following best describes when a hypothesis becomes a theory? a. when one good set of scientific data supports a theory b. when the official scientific method is followed c. when a website is created to display the theory d. when it is supported by consistent data from many experimental trials 9. the combined observations of mattias schleiden, theodor schwann and rudolph virchow resulted in the formation of the cell theory. which of the following is not part of the cell theory? a. all cells contain a nucleus. b. all cells come from other living cells. c. all living organisms are made of one or more cells. d. cells are the basic unit of structure and function of all living things.

Explanation:

1. Microscopic views of plants and animals led to the development of cell - theory as they allowed scientists to observe cells. Fossil bacteria discovery is not directly related to the initial development of cell - theory, nor are vaccine testing and DNA/RNA isolation.
2. The cell theory cannot become a law. Theories explain phenomena based on evidence, while laws describe natural phenomena in a mathematical or descriptive way. The cell theory is an explanation of the nature of living things.
3. The original idea of spontaneous generation of cells was removed from the cell theory as new scientific knowledge showed that all cells come from pre - existing cells.
4. A hypothesis becomes a theory when it is supported by consistent data from many experimental trials. One set of data is not enough, following the scientific method alone doesn't make it a theory, and creating a website has no bearing on it.
5. Not all cells contain a nucleus (prokaryotic cells don't). The other statements are part of the cell theory.

Answer:

1. D. microscopic views of plants and animals
2. No. Theories explain phenomena, laws describe them.
3. C. Cells form through spontaneous generation.
4. D. When it is supported by consistent data from many experimental trials
5. A. All cells contain a nucleus.