Which is a component of the modern cell theory that was not part of the original cell theory? all organisms are made of cells. all cells are similar in composition and metabolic activities. all cells come from preexisting cells. a cell is the basic unit of structure and function for all living things.

            The correct option is that all cells are similar in composition and metabolic activities.
Explanation:
                     The first theory about cell was proposed by two German biologist Theodor Schleiden and Matthias Schwann in 1839. 

Postulates:
                The main postulates of this theory are as follow:
1. Cell is the basic structural and functional unit of living organisms.
3. All living organisms are composed of cells.
3. New cells arise from already pre existing cells by division.

               Modern cell theory is the new version of same cell theory. It also added that all cells are chemically similar in composition and metabolic activities. Cells contain hereditary materials and energy flow occurs with in cell.

An autotrophic protist - they can perform photosynthesis and mainly consist of unicellular algae. they can be divided into number of systematic group according to the shape of their cell and the type of photosynthetic pigments they use.

answer: carbon 14 can only be used to determine the age of the organisms that were once living, and igneous rocks are non living.

explanation:

carbon 14 dating is used to determine the age of the sample by estimating the amount of carbon 14 present in the sample and then comparing it with a reference standard.carbon 14 is a isotope of carbon which is radioactive and unstable. carbon 14 is assimilated by all plants and animals throughout their life from carbon dioxide. however, one the organisms die they stop this assimilation and the carbon 14 content starts to decrease.by knowing how much of carbon 14 is left in an organism after his death, one can estimate the age of the organism. the materials whose age can be estimated by carbon 14 method are the organic compounds. however, some inorganic compounds such as aragonite   shell can also be dated.however, if we consider the igneous rocks it is a non living component which never accumulated carbon 14 in it and thus, we cannot use carbon 14 dating method to estimate its age.