Which of the following is not found in all cells? Cell membrane
Genetic material
Cytoplasm
Cell wall

Cell wall is the structure that is not found in all cells, only in bacteria and plant cells where it is attached to the plasma membrane on the outer surface.

What is a cell wall?

A cell wall is a rigid structure that lies outside the plasma membrane and protects the contents of the cells of algae, fungi, plants, bacteria, and archaea.

Characteristics of a cell wallIt can be a layer of chitin (in the case of fungi), cellulose (plants), peptidoglycan (bacteria), or other materials.It is responsible for protecting the contents of the cell and absolute rigidity to the cell structure.

Therefore, we can conclude that the cell wall is what covers prokaryotic cells and plant cells.

Learn more about the cell wall here: link

The awnser is b i believe

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.